Solved

TabStrip Client Area co-ordinates

Posted on 1998-10-12
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Last Modified: 2013-12-26
I've got a simple TabStrip control on a basic form. It has 4 tabs. When the form is resized, the TabStrip control is resized to the Scale Width/Height of the form. Great so far. Now, I've got 4 Frames, in a collection. The idea is that I associate each Frame with a Tab, and hide/show it (and its contained controls) appropriately. This is all working wonderfully - the correct controls are getting displayed depending on the selected Tab.

My problem is that I can't properly size the Frame within the Tab. The Form itself has a ScaleMode of 1 (Twips), but when I watch the code execute, it appears that the sizes of the Frames (before I resize them and after) aren't getting set properly. For example, when the form is resized to (for example) 10000 x 10000 (twips, don't forget), the tab control ends up with sizes like 9885 x 9315, which is fair enough. But the tab control's client area shows a size of 201.75 x 181.45. Naturally, when I set the frames to this size, they look like crap. At first I thought that somehow the client area sizes were being reported in pixels, rather than twips (despite the fact that all controls are supposed to inherit the parent form's ScaleMode), but that's not right either. I put in the correction (* Screen.TwipsPerPixelX) and they were still to small - they looked about two thirds as big as they should have been. In case it helps, here's the entire subroutine on the form's resize:

Private Sub Form_Resize()
    tabMain.Left = frmMain.ScaleLeft
    tabMain.Top = frmMain.ScaleTop
    tabMain.Width = frmMain.ScaleWidth
    tabMain.Height = frmMain.ScaleHeight
    fraTab(tabMain.SelectedItem.Index).Left = tabMain.ClientLeft
    fraTab(tabMain.SelectedItem.Index).Top = tabMain.ClientTop
    fraTab(tabMain.SelectedItem.Index).Width = tabMain.ClientWidth
    fraTab(tabMain.SelectedItem.Index).Height = tabMain.ClientHeight
End Sub

The main Form is frmMain, the TabStrip is tabMain, and the collection of Frames is fraTab.

Any suggestions?
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Question by:tofff
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Author Comment

by:tofff
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Edited text of question
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Expert Comment

by:Mirkwood
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First some optimalisations:
with frmMain
  tabmain.move .scaleleft, .scaletop, .scalewidth, .scaleheight
end with

 With tabmain
   fraTab.Move .ClientLeft, .ClientTop, .ClientWidth, .ClientHeight
End With
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Expert Comment

by:Mirkwood
Comment Utility
Most likely, the problem disappears when you remove the tabstrip and create it again.
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Expert Comment

by:Mirkwood
Comment Utility
Oeps, I think I see it.
Do you create the form with new? set aform = newFrmMain.
In that case aForm and frmMain are two different instances and have a different size.
Change the code to the code  below:
    tabMain.Left = me.ScaleLeft
    tabMain.Top = me.ScaleTop
    tabMain.Width = me.ScaleWidth
    tabMain.Height = me.ScaleHeight
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Author Comment

by:tofff
Comment Utility
I don't create the form frmMain - it's the startup object of the application.
I changed the code from 'frmMain' to 'Me' anyway - it did not help.
I inserted the optimisations you suggested - they did not help (not that you expected them to).
I removed the TabStrip and created a new one - that did not help.

Any other suggestions?
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Expert Comment

by:Mirkwood
Comment Utility
You didn't by accident create the tabstrip or one of the frames inside another frame?
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Expert Comment

by:Mirkwood
Comment Utility
debug.assert fraTab(tabMain.SelectedItem.Index).container is me
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Author Comment

by:tofff
Comment Utility
No, nothing like that - but I have found the problem. I have VB5.0 installed, with SP2. There are two different files which give access to a TabStrip control - both Microsoft, and both installed by either VB5.0 or SP2 (as above). They are:
COMCTL32.OCX (version 5.01.4319)
FM20.DLL (version 2.01)

Both have VERY different implementations of the same control. I was using the one from FM20.DLL - and, by my best estimation, it doesn;t work. The one in COMCTL32.OCX works fine with my existing code.

Thanks for your help, and why the hell did MSoft put out two different versions of the same control (they even have different parameter lists and orders for some methods!)
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Expert Comment

by:Mirkwood
Comment Utility
FM20.dll is installed by VBA and Office.
You can ask at Customer Services to refund your points since you found the answer yourself.
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Expert Comment

by:TheAnswerMan
Comment Utility
or, you can give the points to me..
a poor lowly down on his luck expert <tin cup out>
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Accepted Solution

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linda101698 earned 190 total points
Comment Utility
I am posting the solution found by so it can be saved in the previously asked questions.  Please see your customer service question for an explanation.

Linda Gardner
Customer Service @ Experts Exchange

Solution:
 I have found the problem. I have VB5.0 installed,
     with SP2. There are two different files which give access to a TabStrip
     control - both Microsoft, and both installed by either VB5.0 or SP2 (as
     above). They are:
     COMCTL32.OCX (version 5.01.4319)
     FM20.DLL (version 2.01)

     Both have VERY different implementations of the same control. I was using
     the one from FM20.DLL - and, by my best estimation, it doesn;t work. The
     one in COMCTL32.OCX works fine with my existing code.

     Thanks for your help, and why the hell did MSoft put out two different versions
     of the same control (they even have different parameter lists and orders for
     some methods!)
0

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