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我需要在 Visual C++ 2005(CLR 模式)的 Windows 窗体项目中使用 Win32 函数,如 GetForegroundWindow()、ShowWindow()、SetForegroundWindow()、SendMessage()、GetWindow()....... 使用这些函数时出现的错误是错误 C3861: 'GetForegroundWindow': identifier not found