C++ 无边框的拖动窗口代码


按下鼠标时，记录下鼠标在窗体上的坐标， 同时用一个BOOL变量记录下鼠标左键按下的状态
弹起左键，则记录状态的布尔变量为FALSE.
处理鼠标移动事件，如果左键同时按下，则为鼠标拖动窗体运动，设置窗体新的左上角坐标。
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{  
    // TODO: 在此添加消息处理程序代码和/或调用默认值  
 
    CDialog::OnMouseMove(nFlags, point);  
    if (this->_leftButtonDown)  
    {  
       /// 鼠标左键按下时，可以拖动窗体  
        CPoint pointChanged = point - (this->_mousePoint);  
        RECT rect;  
        this->GetWindowRect(&rect);  
        this->SetWindowPos(NULL, rect.left   pointChanged.x, rect.top   pointChanged.y, 0, 0, SWP_NOSIZE);  
    }  
}  
void CNoBorderFormDlg::OnLButtonDown(UINT nFlags, CPoint point)  
{  
    // TODO: 在此添加消息处理程序代码和/或调用默认值  
    CDialog::OnLButtonDown(nFlags, point);  
    this->_leftButtonDown = TRUE;  
    this->_mousePoint = CPoint(point);  
}  
 
void CNoBorderFormDlg::OnLButtonUp(UINT nFlags, CPoint point)  
{  
   // TODO: 在此添加消息处理程序代码和/或调用默认值  
 
    CDialog::OnLButtonUp(nFlags, point);  
    this->_leftButtonDown = FALSE;  
}  
 
void CNoBorderFormDlg::OnMouseLeave()  
{  
    // TODO: 在此添加消息处理程序代码和/或调用默认值  
    CDialog::OnMouseLeave();  
    this->_leftButtonDown = FALSE;  
}

补充：软件开发 , C++ ,