我在C#中开发了一个WinForms应用程序,通过从下拉列表中选择它并切换复选框,可以使任何窗口成为“最顶层”。
但是打开一个应用程序似乎有点傻,所以我想知道是否可以在Windows中添加一个条目来运行我选择的程序?
我没有任何实验代码,因为我不知道该图标/点被称为什么,因此我无法研究它。
答案 0 :(得分:3)
我发现这段代码看起来像你想要的那样:
using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WinFormsSystemMenuTest
{
public partial class Form1 : Form
{
#region Win32 API Stuff
// Define the Win32 API methods we are going to use
[DllImport("user32.dll")]
private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
[DllImport("user32.dll")]
private static extern bool InsertMenu(IntPtr hMenu, Int32 wPosition, Int32 wFlags, Int32 wIDNewItem, string lpNewItem);
/// Define our Constants we will use
public const Int32 WM_SYSCOMMAND = 0x112;
public const Int32 MF_SEPARATOR = 0x800;
public const Int32 MF_BYPOSITION = 0x400;
public const Int32 MF_STRING = 0x0;
#endregion
// The constants we'll use to identify our custom system menu items
public const Int32 _SettingsSysMenuID = 1000;
public const Int32 _AboutSysMenuID = 1001;
public Form1()
{
InitializeComponent();
}
protected override void OnHandleCreated(EventArgs e)
{
/// Get the Handle for the Forms System Menu
IntPtr systemMenuHandle = GetSystemMenu(this.Handle, false);
/// Create our new System Menu items just before the Close menu item
InsertMenu(systemMenuHandle, 5, MF_BYPOSITION | MF_SEPARATOR, 0, string.Empty); // <-- Add a menu seperator
InsertMenu(systemMenuHandle, 6, MF_BYPOSITION, _SettingsSysMenuID, "Settings...");
InsertMenu(systemMenuHandle, 7, MF_BYPOSITION, _AboutSysMenuID, "About...");
base.OnHandleCreated(e);
}
protected override void WndProc(ref Message m)
{
// Check if a System Command has been executed
if (m.Msg == WM_SYSCOMMAND)
{
// Execute the appropriate code for the System Menu item that was clicked
switch (m.WParam.ToInt32())
{
case _SettingsSysMenuID:
MessageBox.Show("\"Settings\" was clicked");
break;
case _AboutSysMenuID:
MessageBox.Show("\"About\" was clicked");
break;
}
}
base.WndProc(ref m);
}
}
}
我发现它here。这似乎是你想要的,是吗?
答案 1 :(得分:1)
winform的这个区域称为"Non client area"。
但我认为最简单的解决方案是,如果你的目标是将你的开关添加到所有外部winforms,那就是创建一个进程,在活动窗口窗体的左上角放置一个带有开/关开关的形式。您可以尝试将其直接放在外部表单上,但是您会遇到位置优先级问题。
由于您在问题中包含了“WinApi”,我想您可以获得当前正在运行的进程的窗口句柄,坐标和最顶层属性。