[C / WIN32] CHANGER DE FOND D'ÉCRAN AVEC IACTIVEDESKTOP

int __stdcall SetWallPaper(char* FilePath, BYTE bCenter)
{
    IActiveDesktop* paDesktop;
    WALLPAPEROPT wpOpt;
    WCHAR wFilePath[MAX_PATH+4];
    if(!FilePath) return 1;
    CoInitialize(0);
    ZeroMemory(&wpOpt, sizeof(WALLPAPEROPT));
    if((CoCreateInstance(&CLSID_ActiveDesktop, 0, CLSCTX_INPROC_SERVER, &IID_IActiveDesktop, (LPVOID*)&paDesktop)) != S_OK) return 1;
    MultiByteToWideChar(CP_ACP, 0, FilePath, -1, wFilePath, MAX_PATH);
    paDesktop->lpVtbl->SetWallpaper(paDesktop, wFilePath, 0);
    wpOpt.dwSize = sizeof(WALLPAPEROPT);
	if(bCenter)
	{
		wpOpt.dwStyle = WPSTYLE_CENTER;
	}else wpOpt.dwStyle=WPSTYLE_STRETCH ;
    paDesktop->lpVtbl->SetWallpaperOptions(paDesktop, &wpOpt,0);
    paDesktop->lpVtbl->ApplyChanges(paDesktop, AD_APPLY_ALL);
    paDesktop->lpVtbl->Release(paDesktop);
    CoUninitialize();
    return 0;
}