C#呼叫API函式查詢窗體並關閉
阿新 • • 發佈:2019-02-16
下面的程式碼使用API函式FindWindow查詢名稱為窗體a的窗體,並呼叫API函式SendMessage向目標窗體傳送訊息關閉目標窗體。
public const int WM_CLOSE = 0x10;
[DllImport("user32.dll", EntryPoint = "SendMessageA")]
public static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
[DllImport("User32.dll", EntryPoint = "FindWindow" )]
private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
IntPtr hwnd_win;
hwnd_win = FindWindow(null, "窗體a");
SendMessage(hwnd_win, WM_CLOSE, 0, 0);