remoting/base/dispatch_win.h

   1 // This file was GENERATED by command:
   2 //     pump.py dispatch_win.h.pump
   3 // DO NOT EDIT BY HAND!!!
   4
   5 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   6 // Use of this source code is governed by a BSD-style license that can be
   7 // found in the LICENSE file.
   8
   9 #ifndef REMOTING_BASE_IDISPATCH_DRIVER_WIN_H_
  10 #define REMOTING_BASE_IDISPATCH_DRIVER_WIN_H_
  11
  12 #include <oaidl.h>
  13
  14 #include "base/basictypes.h"
  15 #include "base/template_util.h"
  16 #include "base/win/scoped_variant.h"
  17
  18 namespace remoting {
  19
  20 namespace dispatch {
  21
  22 namespace internal {
  23
  24 // A helper wrapper for |VARIANTARG| that is used to pass parameters to and from
  25 // IDispatch::Invoke(). The latter accepts parameters as an array of
  26 // |VARIANTARG| structures. The calling convention of IDispatch::Invoke() is:
  27 //   - [in] parameters are initialized and freed if needed by the caller.
  28 //   - [out] parameters are initialized by IDispatch::Invoke(). It is up to
  29 //         the caller to free leakable variants (such as VT_DISPATCH).
  30 //   - [in] [out] parameters are combination of both: the caller initializes
  31 //         them before the call and the callee assigns new values correctly
  32 //         freeing leakable variants.
  33 //
  34 // Using |ScopedVariantArg| instead of naked |VARIANTARG| ensures that
  35 // the resources allocated during the call will be properly freed. It also
  36 // provides wrapping methods that convert between C++ types and VARIANTs.
  37 // At the moment the only supported parameter type is |VARIANT| (or
  38 // |VARIANTARG|).
  39 //
  40 // It must be possible to cast a pointer to an array of |ScopedVariantArg| to
  41 // a pointer to an array of |VARIANTARG| structures.
  42 class ScopedVariantArg : public VARIANTARG {
  43  public:
  44   ScopedVariantArg() {
  45     vt = VT_EMPTY;
  46   }
  47
  48   ~ScopedVariantArg() {
  49     VariantClear(this);
  50   }
  51
  52   // Wrap() routines pack the input parameters into VARIANTARG structures so
  53   // that they can be passed to IDispatch::Invoke.
  54
  55   HRESULT Wrap(const VARIANT& param) {
  56     DCHECK(vt == VT_EMPTY);
  57     return VariantCopy(this, &param);
  58   }
  59
  60   HRESULT Wrap(VARIANT* const & param) {
  61     DCHECK(vt == VT_EMPTY);
  62
  63     // Make the input value of an [in] [out] parameter visible to
  64     // IDispatch::Invoke().
  65     //
  66     // N.B. We treat both [out] and [in] [out] parameters as [in] [out]. In
  67     // other words the caller is always responsible for initializing and freeing
  68     // [out] and [in] [out] parameters.
  69     Swap(param);
  70     return S_OK;
  71   }
  72
  73   // Unwrap() routines unpack the output parameters from VARIANTARG structures
  74   // to the locations specified by the caller.
  75
  76   void Unwrap(const VARIANT& param_out) {
  77     // Do nothing for an [in] parameter.
  78   }
  79
  80   void Unwrap(VARIANT* const & param_out) {
  81     // Return the output value of an [in] [out] parameter to the caller.
  82     Swap(param_out);
  83   }
  84
  85  private:
  86   // Exchanges the value (and ownership) of the passed VARIANT with the one
  87   // wrapped by |ScopedVariantArg|.
  88   void Swap(VARIANT* other) {
  89     VARIANT temp = *other;
  90     *other = *this;
  91     *static_cast<VARIANTARG*>(this) = temp;
  92   }
  93
  94   DISALLOW_COPY_AND_ASSIGN(ScopedVariantArg);
  95 };
  96
  97 // Make sure the layouts of |VARIANTARG| and |ScopedVariantArg| are identical.
  98 static_assert(sizeof(ScopedVariantArg) == sizeof(VARIANTARG),
  99               "scoped variant arg should not add data members");
 100
 101 }  // namespace internal
 102
 103 // Invoke() is a convenience wrapper for IDispatch::Invoke. It takes care of
 104 // calling the desired method by its ID and implements logic for passing
 105 // a variable number of in/out parameters to the called method.
 106 //
 107 // The calling convention is:
 108 //   - [in] parameters are passsed as a constant reference or by value.
 109 //   - [out] and [in] [out] parameters are passed by pointer. The pointed value
 110 //         is overwritten when the function returns. The pointed-to value must
 111 //         be initialized before the call, and will be replaced when it returns.
 112 //         [out] parameters may be initialized to VT_EMPTY.
 113 //
 114 // Current limitations:
 115 //   - more than 7 parameters are not supported.
 116 //   - the method ID cannot be cached and reused.
 117 //   - VARIANT is the only supported parameter type at the moment.
 118
 119 HRESULT Invoke(IDispatch* object,
 120                LPCOLESTR const_name,
 121                WORD flags,
 122                VARIANT* const & result_out) {
 123   // Retrieve the ID of the method to be called.
 124   DISPID disp_id;
 125   LPOLESTR name = const_cast<LPOLESTR>(const_name);
 126   HRESULT hr = object->GetIDsOfNames(
 127       IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
 128   if (FAILED(hr))
 129     return hr;
 130
 131   // Request the return value if asked by the caller.
 132   internal::ScopedVariantArg result;
 133   VARIANT* disp_result = NULL;
 134   if (result_out != NULL)
 135     disp_result = &result;
 136
 137
 138   // Invoke the method passing the parameters via the DISPPARAMS structure.
 139   // DISPATCH_PROPERTYPUT and DISPATCH_PROPERTYPUTREF require the parameter of
 140   // the property setter to be named, so |cNamedArgs| and |rgdispidNamedArgs|
 141   // structure members should be initialized.
 142   DISPPARAMS disp_params = { NULL, NULL, 0, 0 };
 143   DISPID dispid_named = DISPID_PROPERTYPUT;
 144   if (flags == DISPATCH_PROPERTYPUT || flags == DISPATCH_PROPERTYPUTREF) {
 145     disp_params.cNamedArgs = 1;
 146     disp_params.rgdispidNamedArgs = &dispid_named;
 147   }
 148
 149   hr = object->Invoke(disp_id, IID_NULL, LOCALE_USER_DEFAULT, flags,
 150                       &disp_params, disp_result, NULL, NULL);
 151   if (FAILED(hr))
 152     return hr;
 153
 154
 155   // Unwrap the return value.
 156   if (result_out != NULL) {
 157     result.Unwrap(result_out);
 158   }
 159
 160   return S_OK;
 161 }
 162
 163 template <typename P1>
 164 HRESULT Invoke(IDispatch* object,
 165                LPCOLESTR const_name,
 166                WORD flags,
 167                const P1& p1,
 168                VARIANT* const & result_out) {
 169   // Retrieve the ID of the method to be called.
 170   DISPID disp_id;
 171   LPOLESTR name = const_cast<LPOLESTR>(const_name);
 172   HRESULT hr = object->GetIDsOfNames(
 173       IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
 174   if (FAILED(hr))
 175     return hr;
 176
 177   // Request the return value if asked by the caller.
 178   internal::ScopedVariantArg result;
 179   VARIANT* disp_result = NULL;
 180   if (result_out != NULL)
 181     disp_result = &result;
 182
 183   // Wrap the parameters into an array of VARIANT structures.
 184   internal::ScopedVariantArg disp_args[1];
 185   hr = disp_args[1 - 1].Wrap(p1);
 186   if (FAILED(hr))
 187     return hr;
 188
 189   // Invoke the method passing the parameters via the DISPPARAMS structure.
 190   // DISPATCH_PROPERTYPUT and DISPATCH_PROPERTYPUTREF require the parameter of
 191   // the property setter to be named, so |cNamedArgs| and |rgdispidNamedArgs|
 192   // structure members should be initialized.
 193   DISPPARAMS disp_params = { disp_args, NULL, 1, 0 };
 194   DISPID dispid_named = DISPID_PROPERTYPUT;
 195   if (flags == DISPATCH_PROPERTYPUT || flags == DISPATCH_PROPERTYPUTREF) {
 196     disp_params.cNamedArgs = 1;
 197     disp_params.rgdispidNamedArgs = &dispid_named;
 198   }
 199
 200   hr = object->Invoke(disp_id, IID_NULL, LOCALE_USER_DEFAULT, flags,
 201                       &disp_params, disp_result, NULL, NULL);
 202   if (FAILED(hr))
 203     return hr;
 204
 205   // Unwrap the parameters.
 206   disp_args[1 - 1].Unwrap(p1);
 207
 208   // Unwrap the return value.
 209   if (result_out != NULL) {
 210     result.Unwrap(result_out);
 211   }
 212
 213   return S_OK;
 214 }
 215
 216 template <typename P1, typename P2>
 217 HRESULT Invoke(IDispatch* object,
 218                LPCOLESTR const_name,
 219                WORD flags,
 220                const P1& p1,
 221                const P2& p2,
 222                VARIANT* const & result_out) {
 223   // Retrieve the ID of the method to be called.
 224   DISPID disp_id;
 225   LPOLESTR name = const_cast<LPOLESTR>(const_name);
 226   HRESULT hr = object->GetIDsOfNames(
 227       IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
 228   if (FAILED(hr))
 229     return hr;
 230
 231   // Request the return value if asked by the caller.
 232   internal::ScopedVariantArg result;
 233   VARIANT* disp_result = NULL;
 234   if (result_out != NULL)
 235     disp_result = &result;
 236
 237   // Wrap the parameters into an array of VARIANT structures.
 238   internal::ScopedVariantArg disp_args[2];
 239   hr = disp_args[2 - 1].Wrap(p1);
 240   if (FAILED(hr))
 241     return hr;
 242   hr = disp_args[2 - 2].Wrap(p2);
 243   if (FAILED(hr))
 244     return hr;
 245
 246   // Invoke the method passing the parameters via the DISPPARAMS structure.
 247   // DISPATCH_PROPERTYPUT and DISPATCH_PROPERTYPUTREF require the parameter of
 248   // the property setter to be named, so |cNamedArgs| and |rgdispidNamedArgs|
 249   // structure members should be initialized.
 250   DISPPARAMS disp_params = { disp_args, NULL, 2, 0 };
 251   DISPID dispid_named = DISPID_PROPERTYPUT;
 252   if (flags == DISPATCH_PROPERTYPUT || flags == DISPATCH_PROPERTYPUTREF) {
 253     disp_params.cNamedArgs = 1;
 254     disp_params.rgdispidNamedArgs = &dispid_named;
 255   }
 256
 257   hr = object->Invoke(disp_id, IID_NULL, LOCALE_USER_DEFAULT, flags,
 258                       &disp_params, disp_result, NULL, NULL);
 259   if (FAILED(hr))
 260     return hr;
 261
 262   // Unwrap the parameters.
 263   disp_args[2 - 1].Unwrap(p1);
 264   disp_args[2 - 2].Unwrap(p2);
 265
 266   // Unwrap the return value.
 267   if (result_out != NULL) {
 268     result.Unwrap(result_out);
 269   }
 270
 271   return S_OK;
 272 }
 273
 274 template <typename P1, typename P2, typename P3>
 275 HRESULT Invoke(IDispatch* object,
 276                LPCOLESTR const_name,
 277                WORD flags,
 278                const P1& p1,
 279                const P2& p2,
 280                const P3& p3,
 281                VARIANT* const & result_out) {
 282   // Retrieve the ID of the method to be called.
 283   DISPID disp_id;
 284   LPOLESTR name = const_cast<LPOLESTR>(const_name);
 285   HRESULT hr = object->GetIDsOfNames(
 286       IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
 287   if (FAILED(hr))
 288     return hr;
 289
 290   // Request the return value if asked by the caller.
 291   internal::ScopedVariantArg result;
 292   VARIANT* disp_result = NULL;
 293   if (result_out != NULL)
 294     disp_result = &result;
 295
 296   // Wrap the parameters into an array of VARIANT structures.
 297   internal::ScopedVariantArg disp_args[3];
 298   hr = disp_args[3 - 1].Wrap(p1);
 299   if (FAILED(hr))
 300     return hr;
 301   hr = disp_args[3 - 2].Wrap(p2);
 302   if (FAILED(hr))
 303     return hr;
 304   hr = disp_args[3 - 3].Wrap(p3);
 305   if (FAILED(hr))
 306     return hr;
 307
 308   // Invoke the method passing the parameters via the DISPPARAMS structure.
 309   // DISPATCH_PROPERTYPUT and DISPATCH_PROPERTYPUTREF require the parameter of
 310   // the property setter to be named, so |cNamedArgs| and |rgdispidNamedArgs|
 311   // structure members should be initialized.
 312   DISPPARAMS disp_params = { disp_args, NULL, 3, 0 };
 313   DISPID dispid_named = DISPID_PROPERTYPUT;
 314   if (flags == DISPATCH_PROPERTYPUT || flags == DISPATCH_PROPERTYPUTREF) {
 315     disp_params.cNamedArgs = 1;
 316     disp_params.rgdispidNamedArgs = &dispid_named;
 317   }
 318
 319   hr = object->Invoke(disp_id, IID_NULL, LOCALE_USER_DEFAULT, flags,
 320                       &disp_params, disp_result, NULL, NULL);
 321   if (FAILED(hr))
 322     return hr;
 323
 324   // Unwrap the parameters.
 325   disp_args[3 - 1].Unwrap(p1);
 326   disp_args[3 - 2].Unwrap(p2);
 327   disp_args[3 - 3].Unwrap(p3);
 328
 329   // Unwrap the return value.
 330   if (result_out != NULL) {
 331     result.Unwrap(result_out);
 332   }
 333
 334   return S_OK;
 335 }
 336
 337 template <typename P1, typename P2, typename P3, typename P4>
 338 HRESULT Invoke(IDispatch* object,
 339                LPCOLESTR const_name,
 340                WORD flags,
 341                const P1& p1,
 342                const P2& p2,
 343                const P3& p3,
 344                const P4& p4,
 345                VARIANT* const & result_out) {
 346   // Retrieve the ID of the method to be called.
 347   DISPID disp_id;
 348   LPOLESTR name = const_cast<LPOLESTR>(const_name);
 349   HRESULT hr = object->GetIDsOfNames(
 350       IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
 351   if (FAILED(hr))
 352     return hr;
 353
 354   // Request the return value if asked by the caller.
 355   internal::ScopedVariantArg result;
 356   VARIANT* disp_result = NULL;
 357   if (result_out != NULL)
 358     disp_result = &result;
 359
 360   // Wrap the parameters into an array of VARIANT structures.
 361   internal::ScopedVariantArg disp_args[4];
 362   hr = disp_args[4 - 1].Wrap(p1);
 363   if (FAILED(hr))
 364     return hr;
 365   hr = disp_args[4 - 2].Wrap(p2);
 366   if (FAILED(hr))
 367     return hr;
 368   hr = disp_args[4 - 3].Wrap(p3);
 369   if (FAILED(hr))
 370     return hr;
 371   hr = disp_args[4 - 4].Wrap(p4);
 372   if (FAILED(hr))
 373     return hr;
 374
 375   // Invoke the method passing the parameters via the DISPPARAMS structure.
 376   // DISPATCH_PROPERTYPUT and DISPATCH_PROPERTYPUTREF require the parameter of
 377   // the property setter to be named, so |cNamedArgs| and |rgdispidNamedArgs|
 378   // structure members should be initialized.
 379   DISPPARAMS disp_params = { disp_args, NULL, 4, 0 };
 380   DISPID dispid_named = DISPID_PROPERTYPUT;
 381   if (flags == DISPATCH_PROPERTYPUT || flags == DISPATCH_PROPERTYPUTREF) {
 382     disp_params.cNamedArgs = 1;
 383     disp_params.rgdispidNamedArgs = &dispid_named;
 384   }
 385
 386   hr = object->Invoke(disp_id, IID_NULL, LOCALE_USER_DEFAULT, flags,
 387                       &disp_params, disp_result, NULL, NULL);
 388   if (FAILED(hr))
 389     return hr;
 390
 391   // Unwrap the parameters.
 392   disp_args[4 - 1].Unwrap(p1);
 393   disp_args[4 - 2].Unwrap(p2);
 394   disp_args[4 - 3].Unwrap(p3);
 395   disp_args[4 - 4].Unwrap(p4);
 396
 397   // Unwrap the return value.
 398   if (result_out != NULL) {
 399     result.Unwrap(result_out);
 400   }
 401
 402   return S_OK;
 403 }
 404
 405 template <typename P1, typename P2, typename P3, typename P4, typename P5>
 406 HRESULT Invoke(IDispatch* object,
 407                LPCOLESTR const_name,
 408                WORD flags,
 409                const P1& p1,
 410                const P2& p2,
 411                const P3& p3,
 412                const P4& p4,
 413                const P5& p5,
 414                VARIANT* const & result_out) {
 415   // Retrieve the ID of the method to be called.
 416   DISPID disp_id;
 417   LPOLESTR name = const_cast<LPOLESTR>(const_name);
 418   HRESULT hr = object->GetIDsOfNames(
 419       IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
 420   if (FAILED(hr))
 421     return hr;
 422
 423   // Request the return value if asked by the caller.
 424   internal::ScopedVariantArg result;
 425   VARIANT* disp_result = NULL;
 426   if (result_out != NULL)
 427     disp_result = &result;
 428
 429   // Wrap the parameters into an array of VARIANT structures.
 430   internal::ScopedVariantArg disp_args[5];
 431   hr = disp_args[5 - 1].Wrap(p1);
 432   if (FAILED(hr))
 433     return hr;
 434   hr = disp_args[5 - 2].Wrap(p2);
 435   if (FAILED(hr))
 436     return hr;
 437   hr = disp_args[5 - 3].Wrap(p3);
 438   if (FAILED(hr))
 439     return hr;
 440   hr = disp_args[5 - 4].Wrap(p4);
 441   if (FAILED(hr))
 442     return hr;
 443   hr = disp_args[5 - 5].Wrap(p5);
 444   if (FAILED(hr))
 445     return hr;
 446
 447   // Invoke the method passing the parameters via the DISPPARAMS structure.
 448   // DISPATCH_PROPERTYPUT and DISPATCH_PROPERTYPUTREF require the parameter of
 449   // the property setter to be named, so |cNamedArgs| and |rgdispidNamedArgs|
 450   // structure members should be initialized.
 451   DISPPARAMS disp_params = { disp_args, NULL, 5, 0 };
 452   DISPID dispid_named = DISPID_PROPERTYPUT;
 453   if (flags == DISPATCH_PROPERTYPUT || flags == DISPATCH_PROPERTYPUTREF) {
 454     disp_params.cNamedArgs = 1;
 455     disp_params.rgdispidNamedArgs = &dispid_named;
 456   }
 457
 458   hr = object->Invoke(disp_id, IID_NULL, LOCALE_USER_DEFAULT, flags,
 459                       &disp_params, disp_result, NULL, NULL);
 460   if (FAILED(hr))
 461     return hr;
 462
 463   // Unwrap the parameters.
 464   disp_args[5 - 1].Unwrap(p1);
 465   disp_args[5 - 2].Unwrap(p2);
 466   disp_args[5 - 3].Unwrap(p3);
 467   disp_args[5 - 4].Unwrap(p4);
 468   disp_args[5 - 5].Unwrap(p5);
 469
 470   // Unwrap the return value.
 471   if (result_out != NULL) {
 472     result.Unwrap(result_out);
 473   }
 474
 475   return S_OK;
 476 }
 477
 478 template <typename P1, typename P2, typename P3, typename P4, typename P5,
 479     typename P6>
 480 HRESULT Invoke(IDispatch* object,
 481                LPCOLESTR const_name,
 482                WORD flags,
 483                const P1& p1,
 484                const P2& p2,
 485                const P3& p3,
 486                const P4& p4,
 487                const P5& p5,
 488                const P6& p6,
 489                VARIANT* const & result_out) {
 490   // Retrieve the ID of the method to be called.
 491   DISPID disp_id;
 492   LPOLESTR name = const_cast<LPOLESTR>(const_name);
 493   HRESULT hr = object->GetIDsOfNames(
 494       IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
 495   if (FAILED(hr))
 496     return hr;
 497
 498   // Request the return value if asked by the caller.
 499   internal::ScopedVariantArg result;
 500   VARIANT* disp_result = NULL;
 501   if (result_out != NULL)
 502     disp_result = &result;
 503
 504   // Wrap the parameters into an array of VARIANT structures.
 505   internal::ScopedVariantArg disp_args[6];
 506   hr = disp_args[6 - 1].Wrap(p1);
 507   if (FAILED(hr))
 508     return hr;
 509   hr = disp_args[6 - 2].Wrap(p2);
 510   if (FAILED(hr))
 511     return hr;
 512   hr = disp_args[6 - 3].Wrap(p3);
 513   if (FAILED(hr))
 514     return hr;
 515   hr = disp_args[6 - 4].Wrap(p4);
 516   if (FAILED(hr))
 517     return hr;
 518   hr = disp_args[6 - 5].Wrap(p5);
 519   if (FAILED(hr))
 520     return hr;
 521   hr = disp_args[6 - 6].Wrap(p6);
 522   if (FAILED(hr))
 523     return hr;
 524
 525   // Invoke the method passing the parameters via the DISPPARAMS structure.
 526   // DISPATCH_PROPERTYPUT and DISPATCH_PROPERTYPUTREF require the parameter of
 527   // the property setter to be named, so |cNamedArgs| and |rgdispidNamedArgs|
 528   // structure members should be initialized.
 529   DISPPARAMS disp_params = { disp_args, NULL, 6, 0 };
 530   DISPID dispid_named = DISPID_PROPERTYPUT;
 531   if (flags == DISPATCH_PROPERTYPUT || flags == DISPATCH_PROPERTYPUTREF) {
 532     disp_params.cNamedArgs = 1;
 533     disp_params.rgdispidNamedArgs = &dispid_named;
 534   }
 535
 536   hr = object->Invoke(disp_id, IID_NULL, LOCALE_USER_DEFAULT, flags,
 537                       &disp_params, disp_result, NULL, NULL);
 538   if (FAILED(hr))
 539     return hr;
 540
 541   // Unwrap the parameters.
 542   disp_args[6 - 1].Unwrap(p1);
 543   disp_args[6 - 2].Unwrap(p2);
 544   disp_args[6 - 3].Unwrap(p3);
 545   disp_args[6 - 4].Unwrap(p4);
 546   disp_args[6 - 5].Unwrap(p5);
 547   disp_args[6 - 6].Unwrap(p6);
 548
 549   // Unwrap the return value.
 550   if (result_out != NULL) {
 551     result.Unwrap(result_out);
 552   }
 553
 554   return S_OK;
 555 }
 556
 557 template <typename P1, typename P2, typename P3, typename P4, typename P5,
 558     typename P6, typename P7>
 559 HRESULT Invoke(IDispatch* object,
 560                LPCOLESTR const_name,
 561                WORD flags,
 562                const P1& p1,
 563                const P2& p2,
 564                const P3& p3,
 565                const P4& p4,
 566                const P5& p5,
 567                const P6& p6,
 568                const P7& p7,
 569                VARIANT* const & result_out) {
 570   // Retrieve the ID of the method to be called.
 571   DISPID disp_id;
 572   LPOLESTR name = const_cast<LPOLESTR>(const_name);
 573   HRESULT hr = object->GetIDsOfNames(
 574       IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
 575   if (FAILED(hr))
 576     return hr;
 577
 578   // Request the return value if asked by the caller.
 579   internal::ScopedVariantArg result;
 580   VARIANT* disp_result = NULL;
 581   if (result_out != NULL)
 582     disp_result = &result;
 583
 584   // Wrap the parameters into an array of VARIANT structures.
 585   internal::ScopedVariantArg disp_args[7];
 586   hr = disp_args[7 - 1].Wrap(p1);
 587   if (FAILED(hr))
 588     return hr;
 589   hr = disp_args[7 - 2].Wrap(p2);
 590   if (FAILED(hr))
 591     return hr;
 592   hr = disp_args[7 - 3].Wrap(p3);
 593   if (FAILED(hr))
 594     return hr;
 595   hr = disp_args[7 - 4].Wrap(p4);
 596   if (FAILED(hr))
 597     return hr;
 598   hr = disp_args[7 - 5].Wrap(p5);
 599   if (FAILED(hr))
 600     return hr;
 601   hr = disp_args[7 - 6].Wrap(p6);
 602   if (FAILED(hr))
 603     return hr;
 604   hr = disp_args[7 - 7].Wrap(p7);
 605   if (FAILED(hr))
 606     return hr;
 607
 608   // Invoke the method passing the parameters via the DISPPARAMS structure.
 609   // DISPATCH_PROPERTYPUT and DISPATCH_PROPERTYPUTREF require the parameter of
 610   // the property setter to be named, so |cNamedArgs| and |rgdispidNamedArgs|
 611   // structure members should be initialized.
 612   DISPPARAMS disp_params = { disp_args, NULL, 7, 0 };
 613   DISPID dispid_named = DISPID_PROPERTYPUT;
 614   if (flags == DISPATCH_PROPERTYPUT || flags == DISPATCH_PROPERTYPUTREF) {
 615     disp_params.cNamedArgs = 1;
 616     disp_params.rgdispidNamedArgs = &dispid_named;
 617   }
 618
 619   hr = object->Invoke(disp_id, IID_NULL, LOCALE_USER_DEFAULT, flags,
 620                       &disp_params, disp_result, NULL, NULL);
 621   if (FAILED(hr))
 622     return hr;
 623
 624   // Unwrap the parameters.
 625   disp_args[7 - 1].Unwrap(p1);
 626   disp_args[7 - 2].Unwrap(p2);
 627   disp_args[7 - 3].Unwrap(p3);
 628   disp_args[7 - 4].Unwrap(p4);
 629   disp_args[7 - 5].Unwrap(p5);
 630   disp_args[7 - 6].Unwrap(p6);
 631   disp_args[7 - 7].Unwrap(p7);
 632
 633   // Unwrap the return value.
 634   if (result_out != NULL) {
 635     result.Unwrap(result_out);
 636   }
 637
 638   return S_OK;
 639 }
 640
 641 } // namespace dispatch
 642
 643 } // namespace remoting
 644
 645 #endif // REMOTING_BASE_IDISPATCH_DRIVER_WIN_H_