[WinApi] C#获取其他窗口文本框内容

声明部分：

const int WM_GETTEXT = 0x000D;const int WM_GETTEXTLENGTH = 0x000E; [DllImport("user32.dll", EntryPoint = "SendMessageA")]public static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, Byte[] lParam); [DllImport("user32.dll", EntryPoint="SendMessageA")]public static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

函数部分：

IntPtr mwh = FindMainWindowHandle("窗口名称", 100, 25);  //主窗口句柄IntPtr HwndStatue = FindWindowEx(mwh, IntPtr.Zero, "Edit", null);   //文本框句柄 if (HwndStatue != IntPtr.Zero){                    int TextLen;    TextLen = SendMessage(HwndStatue, WM_GETTEXTLENGTH, 0, 0);    Byte[] byt = new Byte[TextLen];    SendMessage(HwndStatue, WM_GETTEXT, TextLen + 1, byt);    string str = Encoding.Default.GetString(byt);}