我正在嘗試在 Win32 中構建檔案管理器，但圖示有問題。每當我嘗試獲取與 Windows 10 應用程式相關聯的圖示時，例如 .png（照片應用程式），該圖示就是白紙。我做錯了什么？在此先感謝，請回答:)
BOOL InitTreeViewImageLists(HWND hwndTV) {
HIMAGELIST himl; // handle to image list
HBITMAP hbmp; // handle to bitmap
// Create the image list.
if ((himl = ImageList_Create(16,
16,
ILC_COLOR16 | ILC_MASK,
3, 0)) == NULL)
return FALSE;
// Add the open file, closed file, and document bitmaps.
HICON hIcon;
SHFILEINFO sfi;
LPCWSTR path = L"C:\\Users\\Shalev\\Desktop\\WhatsApp.lnk";
sfi = GetShellInfo(path);
HICON* iconHandles = new HICON;
hIcon = sfi.hIcon;
cout << hIcon << endl;
g_nOpen = sfi.iIcon;
ImageList_AddIcon(himl, hIcon);
sfi = GetShellInfo(L"C:\\");
hIcon = sfi.hIcon;
g_nClosed = sfi.iIcon;
ImageList_AddIcon(himl, hIcon);
sfi = GetShellInfo(L"C:\\");
hIcon = sfi.hIcon;
g_nDocument = sfi.iIcon;
ImageList_AddIcon(himl, hIcon);
// Associate the image list with the tree-view control.
TreeView_SetImageList(hwndTV, himl, TVSIL_NORMAL);
return TRUE;
}
SHFILEINFO GetShellInfo(LPCWSTR path) {
SHFILEINFO sfi;
SecureZeroMemory(&sfi, sizeof(sfi));
SHGetFileInfo(path, 0, &sfi, sizeof(sfi), SHGFI_SYSICONINDEX | SHGFI_SHELLICONSIZE | SHGFI_ICON | SHGFI_SMALLICON | SHGFI_USEFILEATTRIBUTES);
return sfi;
}
uj5u.com熱心網友回復：
您可以使用IShellItemImageFactory 介面，如下所示：
...
CoInitializeEx(NULL, COINIT_APARTMENTTHREADED); // need this somewhere when your thread begins, not for every call
...
IShellItemImageFactory* factory;
if (SUCCEEDED(SHCreateItemFromParsingName(path, nullptr, IID_PPV_ARGS(&factory))))
{
// the GetImage method defines a required size and multiple flags
// with which you can specify you want the icon only or the thumbnail, etc.
HBITMAP bmp;
if (SUCCEEDED(factory->GetImage(SIZE{ 256, 256 }, SIIGBF_ICONONLY, &bmp)))
{
... // do something with the HBITMAP
DeleteObject(bmp);
}
factory->Release();
}
...
CoUninitialize(); // call this each time you successfully called CoInitializeEx
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