Alt+Tab?

David Thielke

Hi,

I'm writing a program that basically just sits on the desktop in a borderless form. I have everything working as I'd like, except for the 'alt-tab' function of windows. Does anyone know of a way to remove a form from the 'alt-tab' list of programs?

Thanks

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

David Thielke19y ago
For whatever reason removing the form from the task bar doesn't also remove it from this list. What you gave me works though - thanks a lot.
Alan19y ago
I'd have thought that setting the Form's ShowInTaskbar property to false would remove it from the Alt-Tab list as well ?

However, if it doesn't, then try these Win32 calls:

using System.Runtime.InteropServices;

........

[DllImport("user32.dll")]
static extern int GetWindowLong( IntPtr hWnd, int nIndex);

[DllImport("user32.dll")]
static extern int SetWindowLong( IntPtr hWnd, int nIndex, int
dwNewLong);

const int GWL_EXSTYLE = -20;
const int WS_EX_TOOLWINDOW = 0x80;

.......

IntPtr hWnd = this.Handle;

int dwExStyle = GetWindowLong(hWnd, GWL_EXSTYLE);
SetWindowLong(hWnd, GWL_EXSTYLE, dwExStyle | WS_EX_TOOLWINDOW);