setup_native/source/win32/customactions/shellextensions/iconcache.cxx

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   9  * $RCSfile: iconcache.cxx,v $
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  30
  31 #ifdef _MSC_VER
  32 #pragma warning(push, 1) /* disable warnings within system headers */
  33 #endif
  34 #define WIN32_LEAN_AND_MEAN
  35 #include <windows.h>
  36 #include <msiquery.h>
  37 #ifdef _MSC_VER
  38 #pragma warning(pop)
  39 #endif
  40
  41 #include <stdlib.h>
  42
  43 extern "C" UINT __stdcall RebuildShellIconCache(MSIHANDLE)
  44 {
  45     // Rebuild icon cache on windows OS prior XP
  46
  47     OSVERSIONINFO       osverinfo;
  48
  49     osverinfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
  50
  51     if (
  52         GetVersionEx( &osverinfo ) &&
  53         VER_PLATFORM_WIN32_NT == osverinfo.dwPlatformId &&
  54         (
  55         5 < osverinfo.dwMajorVersion ||
  56         5 == osverinfo.dwMajorVersion && 0 < osverinfo.dwMinorVersion
  57         )
  58         )
  59     {
  60         return ERROR_SUCCESS;
  61     }
  62
  63     HKEY        hKey;
  64     DWORD       dwDispostion;
  65     LONG        lError = RegCreateKeyEx( HKEY_CURRENT_USER, TEXT("Control Panel\\Desktop\\WindowMetrics"), 0, NULL, REG_OPTION_VOLATILE, KEY_SET_VALUE | KEY_QUERY_VALUE, NULL, &hKey, &dwDispostion );
  66
  67     if ( ERROR_SUCCESS == lError )
  68     {
  69         TCHAR   szValue[256];
  70         TCHAR   szTempValue[256];
  71         DWORD   cbValue = sizeof(szValue);
  72         DWORD   dwType;
  73         int             iSize = 0;
  74
  75         lError = RegQueryValueEx( hKey, TEXT("Shell Icon Size"), 0, &dwType, (LPBYTE)szValue, &cbValue );
  76
  77         if ( ERROR_SUCCESS == lError )
  78             iSize = atoi( szValue );
  79
  80         if ( !iSize )
  81         {
  82             iSize = GetSystemMetrics( SM_CXICON );
  83             itoa( iSize, szValue, 10 );
  84             cbValue = strlen( szValue ) + 1;
  85             dwType = REG_SZ;
  86         }
  87
  88         itoa( iSize + 1, szTempValue, 10 );
  89         lError = RegSetValueEx( hKey, TEXT("Shell Icon Size"), 0, dwType, (LPBYTE)szTempValue, strlen( szTempValue ) + 1 );
  90
  91         LRESULT lResult = SendMessageTimeout(
  92              HWND_BROADCAST,
  93              WM_SETTINGCHANGE,
  94              SPI_SETNONCLIENTMETRICS,
  95              (LPARAM)TEXT("WindowMetrics"),
  96              SMTO_NORMAL|SMTO_ABORTIFHUNG,
  97              0, NULL);
  98
  99         lError = RegSetValueEx( hKey, TEXT("Shell Icon Size"), 0, dwType, (LPBYTE)szValue, cbValue );
 100
 101         lResult = SendMessageTimeout(
 102              HWND_BROADCAST,
 103              WM_SETTINGCHANGE,
 104              SPI_SETNONCLIENTMETRICS,
 105              (LPARAM)TEXT("WindowMetrics"),
 106              SMTO_NORMAL|SMTO_ABORTIFHUNG,
 107              0, NULL);
 108
 109         lError = RegCloseKey( hKey );
 110     }
 111
 112     return ERROR_SUCCESS;
 113 }