添加项目到默认的文本框上下文菜单 [英] Add item to the default TextBox context menu

问题描述

有什么办法增加一个额外的项目添加到默认的WinForms文本框的上下文菜单，而无需创建我自己的？

is there any way to add an extra item to the default WinForms TextBox context menu without creating my own?

推荐答案

子类文本框（从中获得）或本机手柄（带的NativeWindow），然后重写窗口过程如下：

Subclass TextBox (derive from it) or native handle (with NativeWindow), and then override window procedure as follows:

protected override void WndProc(ref Message m)
{
  if (m.Msg == <your menu id>) { ... return; }
  ...

  if (m.Msg == 0x0093 /*WM_UAHINITMENU*/ || m.Msg == 0x0117 /*WM_INITMENUPOPUP*/ || m.Msg == 0x0116 /*WM_INITMENU*/)
  {
    IntPtr shortcut = m.Msg == 0x0093 ? Marshal.ReadIntPtr(m.LParam) : m.WParam;
    // add <your menu id> to shortcut
    ...
  }
  ...
  base.WndProc(ref m);
}

这篇关于添加项目到默认的文本框上下文菜单的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！