How to open window system menu on right click?
miroxlav
I have a borderless splash screen form displaying loading progress and containing Minimize and Close buttons (something similar to splash screens seen in Office 2013). I would also like to provide system menu of the window which opens on right click anywhere in the form.
Currently I'm achieving opening the menu by sending keys Alt+Space.
System.Windows.Forms.SendKeys.SendWait("% ") 'sending Alt+Space
With this approach, window system menu always opens in top-left corner of the window.
Is there a way to programatically open the system menu the same way as Windows does natively when user right-clicks title bar of the window? An API call or message which pops up the menu open?
I would like to keep the system menu available in the app because I have added also items "About" and "Settings" in there. (This app serves as an independent launcher and updater of the core app.)
The platform is WPF with Windows Forms library included, too (due to that workaround using SendWait()). Feel free to choose VB or C# in case of posting some code.
Hans Passant
There is no baked-in winapi function to display the system menu. You can display it yourself by using pinvoke. The GetSystemMenu() function returns a handle to the system menu, you display it by using TrackPopupMenu(), you execute the selected command by calling SendMessage to send the WM_SYSCOMMAND.
Some sample code that shows how to do this and includes the necessary declarations:
using System.Runtime.InteropServices;
...
private void Window_MouseDown(object sender, MouseButtonEventArgs e) {
if (e.ChangedButton == MouseButton.Right) {
IntPtr hWnd = new System.Windows.Interop.WindowInteropHelper(this).Handle;
RECT pos;
GetWindowRect(hWnd, out pos);
IntPtr hMenu = GetSystemMenu(hWnd, false);
int cmd = TrackPopupMenu(hMenu, 0x100, pos.left, pos.top, 0, hWnd, IntPtr.Zero);
if (cmd > 0) SendMessage(hWnd, 0x112, (IntPtr)cmd, IntPtr.Zero);
}
}
[DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wp, IntPtr lp);
[DllImport("user32.dll")]
static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
[DllImport("user32.dll")]
static extern int TrackPopupMenu(IntPtr hMenu, uint uFlags, int x, int y,
int nReserved, IntPtr hWnd, IntPtr prcRect);
[DllImport("user32.dll")]
static extern bool GetWindowRect(IntPtr hWnd, out RECT rect);
struct RECT { public int left, top, right, bottom; }
Note that you can display the menu anywhere you want, I just picked the upper-left corner of the window. Beware that the position values are in pixels.
Collected from the Internet
Please contact [email protected] to delete if infringement.
edited at
- Prev: Linq OrderBy but ignore first word if "the"
- Next: Setting Environment variables for Eclipse IDE launching
Related
Related Related
- 1
System hangs on "Open document" right click context menu (Xubuntu)
- 2
How to add "open with custom command" option in right click menu of Nautilus
- 3
How to add "open with custom command" option in right click menu of Nautilus
- 4
Make GIMP 2.8 open in a maximised window and add an "Edit with GIMP" right-click context menu
- 5
Adding an item to right-click menu on window
- 6
Open in ConEmu right click menu windows 7
- 7
How to open D3.js Context Menu on left click instead of Right click
- 8
How to open D3.js Context Menu on left click instead of Right click
- 9
When the window menu is in the title bar, how can I set the focus click to not open a menu?
- 10
How to actually click a generated right click menu?
- 11
How to react to 'Close window' in right-click menu of task bar in Windows
- 12
How do i add a cmd delete option to the right click context menu in window 10
- 13
How to open kendo window on click
- 14
How do you add "open in terminal" to the right-click mouse menu for folders/directories?
- 15
How do you add "open in terminal" to the right-click mouse menu for folders/directories?
- 16
How to make "open in terminal" in the right click menu use Terminator instead of gnome terminal?
- 17
In Ubuntu 17.10, how can I add entries to the right click context menu, like "open in terminal"?
- 18
How do I set right-click on folder background to show "Open PowerShell Window here"?
- 19
How to disable default right click menu of browser
- 20
How to add entry to right click menu?
- 21
How to diagnose right-click menu slowness?
- 22
(Actionscript 3) How to Hide Right Click Menu?
- 23
Add "Open MSYS terminal here" in the Windows right click context menu?
- 24
Open terminal from Nautilus right-click menu
- 25
Can I open a file as root by just using the right click menu
- 26
jquery act on right click when user tries to open a new window
- 27
Selenium Python right click "Open link in new Window" - (Windows 7)
- 28
Selenium Python right click "Open link in new Window" - (Windows 7)
- 29
Right click on a subgrid missing the "Open in a New Window" option
Comments