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阻止控件重繪

port user error extern set cnblogs text and sta

//控件重繪
[DllImport("USER32.DLL ", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool SendMessage(
    IntPtr hWnd, // 目標窗口句柄   
    int Msg, // 消息
    bool wParam, // 第一個消息參數 false阻止 true不阻止
    int lParam );
const int WM_GETTEXT =0x000B;
SendMessage(this.Handle, WM_GETTEXT, false, 0);

阻止控件重繪