知识大全 WinForm特效:拦截窗体上各个部位的点击

Posted 2022-07-17 客户

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　　windows窗体的标题栏无法直接通过一些默认的事件来控制需要了解和WM_NCHITTEST相关的windows消息以下示例演示了最简单的效果片断他会把客户区和标题栏的效果互换比如无法按住标题栏拖动窗体而是改为了安抓客户区拖动并禁用了关闭按钮其中m Result从到都有定义分别度应了整个窗体的各个部位比如代表客户区代表最小化按钮等等 using System; using System Windows Forms; namespace WindowsApplication public partial class Form : Form public Form () InitializeComponent(); this Text = 双击左上角图标关闭窗体 ; //拦击标题栏鼠标位置事件 const int WM_NCHITTEST = x ; protected override void WndProc(ref Message m) base WndProc(ref m); if (m Msg == WM_NCHITTEST) switch (m Result ToInt ()) case ://客户区 m Result = new IntPtr( ); break; case ://标题栏 m Result = new IntPtr( ); break; case : m Result = new IntPtr( ); break; default: Console WriteLine(m); break;

　　下面是各个常量的意义从Delphi VCL中摘取

　　 WM_NCHITTEST and MOUSEHOOKSTRUCT Mouse Position Codes $EXTERNALSYM HTERROR HTERROR = ; $EXTERNALSYM HTTRANSPARENT HTTRANSPARENT = ; $EXTERNALSYM HTNOWHERE HTNOWHERE = ; $EXTERNALSYM HTCLIENT HTCLIENT = ; $EXTERNALSYM HTCAPTION HTCAPTION = ; $EXTERNALSYM HTSYSMENU HTSYSMENU = ; $EXTERNALSYM HTGROWBOX HTGROWBOX = ; $EXTERNALSYM HTSIZE HTSIZE = HTGROWBOX; $EXTERNALSYM HTMENU HTMENU = ; $EXTERNALSYM HTHSCROLL HTHSCROLL = ; $EXTERNALSYM HTVSCROLL HTVSCROLL = ; $EXTERNALSYM HTMINBUTTON HTMINBUTTON = ; $EXTERNALSYM HTMAXBUTTON HTMAXBUTTON = ; $EXTERNALSYM HTLEFT HTLEFT = ; $EXTERNALSYM HTRIGHT HTRIGHT = ; $EXTERNALSYM HTTOP HTTOP = ; $EXTERNALSYM HTTOPLEFT HTTOPLEFT = ; $EXTERNALSYM HTTOPRIGHT HTTOPRIGHT = ; $EXTERNALSYM HTBOTTOM HTBOTTOM = ; $EXTERNALSYM HTBOTTOMLEFT HTBOTTOMLEFT = ; $EXTERNALSYM HTBOTTOMRIGHT HTBOTTOMRIGHT = ; $EXTERNALSYM HTBORDER HTBORDER = ; $EXTERNALSYM HTREDUCE HTREDUCE = HTMINBUTTON; $EXTERNALSYM HTZOOM HTZOOM = HTMAXBUTTON; $EXTERNALSYM HTSIZEFIRST HTSIZEFIRST = HTLEFT; $EXTERNALSYM HTSIZELAST HTSIZELAST = HTBOTTOMRIGHT; $EXTERNALSYM HTOBJECT HTOBJECT = ; $EXTERNALSYM HTCLOSE HTCLOSE = ; $EXTERNALSYM HTHELP HTHELP = ;

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