如何通过SendMessage设置对话框图标？

// Sets the dialog box icons

inline void chSETDLGICONS(HWND hwnd, int idi) {

SendMessage(hwnd, WM_SETICON, TRUE, (LPARAM)

LoadIcon((HINSTANCE) GetWindowLongPtr(hwnd, GWLP_HINSTANCE),

MAKEINTRESOURCE(idi)));

SendMessage(hwnd, WM_SETICON, FALSE, (LPARAM)

LoadIcon((HINSTANCE) GetWindowLongPtr(hwnd, GWLP_HINSTANCE),

MAKEINTRESOURCE(idi)));

}

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