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Prevent window caption blinking on activation

Posted on 2003-11-23
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Last Modified: 2007-12-19
I have an icon in system tray.
Double click on that icon fires an event in which I'm using me.show to make the window appear.
But when it appears, its not activated like the caption is grayed out and it blinks 3 times unless I click on it.
AppActivate solves the problem but I can't use it since I have multiple instances of my program running at the same time and they all have same caption while appactivate works on caption title so I want an alternate.

Note: setactivewindow, setforegroundwindow, setdesktopwindow, me.setfocus e.t.c nothing works.
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Question by:Hasan_Khan
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7 Comments
 
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Expert Comment

by:ambientnet
ID: 9808411
Hasan,

This might work (if not, plz let me know):

''bas code:
Public Declare Function SetFocusAPI Lib "user32.dll" Alias "SetFocus" (ByVal hWnd As Long) As Long

''form code:

Dim retval As Long  ' return value
' Give your form's hWnd focus
retval = SetFocusAPI(me.hWnd)


If you have flashing problems, try this, too:

''bas code

Private Type FLASHWINFO
  cbSize As Long
  Hwnd As Long
  dwFlags As Long
  uCount As Long
  dwTimeout As Long
End Type

Private Const FLASHW_STOP = 0

Private Declare Function FlashWindowEx Lib "user32" _
   (FWInfo As FLASHWINFO) As Boolean

''form code:

Dim bRet As Boolean
Dim udtFWInfo As FLASHWINFO

Dim Hwnd as Long, Dim uCount As Long

hWnd = me.hWnd
uCount = 1

With udtFWInfo
   .cbSize = 20
   .Hwnd = hWnd
   .dwFlags = FLASHW_TRAY
   .uCount = uCount 'flash window x times
   .dwTimeout = 0
End With

bRet = FlashWindowEx(udtFWInfo)

~    http://www.freevbcode.com/ShowCode.Asp?ID=1447


hope this helps...

-m
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Author Comment

by:Hasan_Khan
ID: 9808895
It doesn't blink anymore but still it ain't activated.
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Author Comment

by:Hasan_Khan
ID: 9810237
I've found a perfect solution to the problem.
I temporarily add few white spaces at the end of the caption.
Do the AppActivate on it and then change it back.

Nothing else works for me.
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LVL 1

Expert Comment

by:ambientnet
ID: 9811311
Hasan:

''bas
Declare Function SetForegroundWindow Lib "user32" (ByVal hWnd As Long) As Long

''form
SetForegroundWindow me.hWnd

may work...

-m
0
 
LVL 1

Expert Comment

by:ambientnet
ID: 9811318
Hasan:
     Ack, you've already tried that... nm... Perhaps use SetForegroundWindow in combination with the remove blinking code? I'm out of ideas.. :)

-m
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Accepted Solution

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PashaMod earned 0 total points
ID: 9811407
Question closed and points refunded

PashaMod
CS Moderator
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Author Comment

by:Hasan_Khan
ID: 9812986
ambientnet I've tried all the combinations with all the APIs but the problem got solved only by the way I mentioned above.
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