Afrow UK
4th August 2003 22:46 UTC

Remove task bar item
If I am unable to create a tray icon, is it possible to hide the programs' task bar item?
Also, once hiding it, I would like to be able to show it again.

Thanks

-Stu

Afrow UK
5th August 2003 12:09 UTC

If it cannot be done using the System plugin, can it be done from changing somthing in the UI exe with Resource Hacker?

-Stu

kichik
5th August 2003 12:44 UTC

It can be done using the System plug-in. You need to call GetWindowLong and SetWindowLong. Search Google for C code that does this and try to convert it to System.dll calls.

Afrow UK
5th August 2003 12:51 UTC

I've looked at those on MSDN to no avail.
All I want to do now is remove the task bar item for my settings exe that is executed from my main installer.
I no-longer want to be able to get it back again.

Help! :(

-Stu

kichik
5th August 2003 13:05 UTC

First result on Google for "SetWindowLong taskbar":
http://www.experts-exchange.com/Prog..._10081312.html

Convert that to System.dll and it should work. If you have .NET Framework search for the constants (GWL_EXSTYLE, WE_EX_..., etc.) in the .h files in the Include directory of the framework. If you can't find it, add VB to the search term, they always define the constants there.

Afrow UK
5th August 2003 14:43 UTC

This is a small attempt; i'm sure it is extremely incomplete or completely wrong!

System::Call 'Win32::SetWindowLong($HWNDPARENT, GWL_EXSTYLE)'

-Stu

Afrow UK
5th August 2003 14:49 UTC

I also found this:
http://upc.pkmn.co.uk/win32/task.shtml

-Stu

Afrow UK
9th August 2003 14:11 UTC

I know a plugin is being made to do this, but what would be the System plugin way?
I just want to use the System plugin code for now to see what advantages/disadvantages it will make.

-Stu

kichik
9th August 2003 14:15 UTC

You were on the right track, why did you stop? You should define GWL_EXSTYLE as the right value, add another parameter to the function call (SetWindowLong takes 3 not 2) and add 'A' to the function name.

Afrow UK
9th August 2003 14:30 UTC

!define GWL_EXSTYLE -20

System::Call 'Win32::SetWindowLongA($HWNDPARENT, ${GWL_EXSTYLE}, )'

I'm not at all sure what GWL_EXSTYLE should be.
I could only find
Const GWL_EXSTYLE = (-20)
on some web hits.

Also, have I added another parameter correctly?

-Stu

Afrow UK
9th August 2003 14:35 UTC

Looking on MSDN, is this what I want?

WS_EX_NOACTIVATE

Description:
Windows 2000/XP: A top-level window created with this style does not become the foreground window when the user clicks it. The system does not bring this window to the foreground when the user minimizes or closes the foreground window.
To activate the window, use the SetActiveWindow or SetForegroundWindow function.

The window does not appear on the taskbar by default. To force the window to appear on the taskbar, use the WS_EX_APPWINDOW style.

-Stu

kichik
9th August 2003 15:49 UTC

You have to call it in .onGUIInit or it won't take affect. The code is:

!define GWL_EXSTYLE -20
!define WS_EX_APPWINDOW 0x040000
!define WS_EX_TOOLWINDOW 0x000080

Function .onGUIInit
System::Call "user32::GetWindowLongA(i $HWNDPARENT, i ${GWL_EXSTYLE}) i .s"
Pop $1
IntOp $2 ${WS_EX_APPWINDOW} ~
IntOp $1 $1 & $2
IntOp $1 $1 | ${WS_EX_TOOLWINDOW}
System::Call "user32::SetWindowLongA(i $HWNDPARENT, i ${GWL_EXSTYLE}, i r1)"
FunctionEnd

Afrow UK
9th August 2003 17:18 UTC

Yikes, I knew it wouldn't be that simple :(

Thanks, it works perfect (on WinXP)
I've added the styles to the ui too.

It's good that it doesn't show in Alt+Tab too, because my installer is executing this dialog with ExecWait anyway.

-Stu

tarwal2
19th August 2003 21:28 UTC

I used a different (slightly easier) approach to this same problem.

Basically I moved all of the content from my main install section to the GUIInit function and then changed my main install section to a single line reading: "SetAutoClose true".

I never see the installation window and everything works perfectly :)

Afrow UK
20th August 2003 14:26 UTC

Shouldn't you have placed it all in onInit?

-Stu

tarwal2
20th August 2003 16:11 UTC

I don't think $HWNDPARENT works properly in .onInit...althought it might work. Since I'm trying to use a tray icon in my setup I assumed I would have the problem where the tray icon disappears where you mouse over it unless I put all of the stuff in my GUIInit function.

Afrow UK
20th August 2003 16:24 UTC

Oh ok, when you said installing files, that's different.
Yes, $HWNDPARENT only exists onGUIInit, and not onInit.

-Stu