Good night gentlemen,
I would like to see a code using the ShowWindow API with C# and .NET 2003.
I have an example here but it's not working. I think it's simple, but I'm facing troubles.
My code goes like this:
#region
Constants private const int SW_HIDE = 0; private const int SW_SHOWNORMAL = 1; private const int SW_SHOW = 5;#endregion
Constants#region
APIs[System.Runtime.InteropServices.DllImport(
"coredll.dll", CharSet=System.Runtime.InteropServices.CharSet.Auto)] private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);[System.Runtime.InteropServices.DllImport(
"coredll.dll", CharSet=System.Runtime.InteropServices.CharSet.Auto)] private static extern bool ShowWindow(IntPtr hwnd, int nCmdShow);[System.Runtime.InteropServices.DllImport(
"coredll.dll", CharSet=System.Runtime.InteropServices.CharSet.Auto)] private static extern bool EnableWindow(IntPtr hwnd, bool enabled);#endregion
APIs public static void ShowApp(){
IntPtr h = FindWindow(
null, "Form1");ShowWindow(h, SW_SHOW);
EnableWindow(h,
true);}
public static void HideApp(){
IntPtr h = FindWindow(
null, "Form1");ShowWindow(h, SW_HIDE);
EnableWindow(h,
false);}
The code works fine when I use the static method HideApp(), it definitly hides my "Form1" form. But when I use the ShowApp it didn't show my form. The FindWindow API returns a pointer to my form, it goes true the ShowWindows and EnableWindow lines without error, but my form is not shown.
What I'm doing wrong
Thanks in advance.
How to use the ShowWindow API to hide and show a form ?
olgaF
Hi Alex, yes, the reason is because the form I'm trying to hide isn't inside my app, it's another app running on the device. I'm trying to do it because I'm building a kiosk app.
Well I think I realize my error. There's nothing wrong with the code I posted.
I did another test and it works.
I think I misunderstood my tests.
Thanks anyway.
slein
Have you tried doing a form.update (or is it form.refresh ) after you call the ShowWindow
I have a module of windows calls, it's in vb.net tho, which I know you c# fellows loath, but I'll post it if you want it
William Bartholomew
Is there any reason why you don't want to use Form.Show and Form.Hide
Also - to bring the application to foreground the most effective way it to launch it again (programmatically). The runtime will take care of it. Something like:
Process.Start(typeof(Program).Assembly.GetModules()[0].FullyQualifiedName);