Windows 7上的LoadIconWithScaleDown的GetProcAddress失败

Question

我正在使用以下代码动态链接到LoadIconWithScaleDown API，以便我的代码能够在Windows XP上运行：

HRESULT (WINAPI *pfnLoadIconWithScaleDown)(HINSTANCE, PCWSTR, int, int, HICON *);

HMODULE hComCtrl32 = LoadLibrary(_T("Comctl32.dll"));
if(hComCtrl32)
{
    (FARPROC&)pfnLoadIconWithScaleDown = GetProcAddress(hComCtrl32, "LoadIconWithScaleDownW");
}

我在Windows 7上尝试此代码，但'pfnLoadIconWithScaleDown'始终为NULL。为什么呢？

Answer 1

LoadIconWithScaleDown()没有ASCII（A）和UNICODE（W）版本，因此请将GetProcAddress()调用更改为：

pfnLoadIconWithScaleDown = GetProcAddress(hComCtrl32, "LoadIconWithScaleDown");