Question

Get Left, Right of control position relative to Forms client rect using only the hWnd

Asked by: danaseaman

With control hWnd how to I get a controls Position on Form using only API.
Width,Height can be calculated using GetWindowRect or GetClientRect.
If I knew the Screen coordinates of the Foms client rect I could just subtract the Left value from GetWindowRect.

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Asked On
2009-03-04 at 02:47:32ID24196955
Tags

Vb6 Classic

Topic

Visual Basic Programming

Participating Experts
1
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Comments
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Answers

 

by: robinuPosted on 2009-03-04 at 02:53:28ID: 23793443

Does the GetWindowRect not also provide the Left and Top position?

See http://www.experts-exchange.com/Programming/Languages/Visual_Basic/VB_Controls/Q_23823203.html

 

by: danaseamanPosted on 2009-03-04 at 02:59:25ID: 23793480

Yes, but it is in Screen coordinates whereas I need it relative to the Forms client rectangle (or controls container). The correct solution should match.Left and Right properties of the control in the Properties window.

 

by: robinuPosted on 2009-03-04 at 03:25:24ID: 23793628

And if you also retrieve the coordinates of the form the control is on?
You can determine e.g. the left position relative in the form.

But you will have a mismatch with the buttons' position properties.
Have look at http://www.powerbasic.com/support/pbforums/showthread.php?t=36409

 

by: danaseamanPosted on 2009-03-04 at 03:57:35ID: 23793811

Getting closer... GetWindowInfo looks promising but I can't find the Type declare needed fto call it (WindowInfo or pWindowInfo).

 

by: robinuPosted on 2009-03-04 at 04:14:39ID: 23793927

WINDOWINFO:

(http://msdn.microsoft.com/en-us/library/ms632610(VS.85).aspx)

Public Structure WINDOWINFO
cbSize As Long
rcWindow As RECT
rcClient As RECT
dwStyle As Long
dwExStyle As Long
cxWindowBorders As Long
cyWindowBorders As Long
atomWindowtype As Long
wCreatorVersion As Long
End Structure

                                              
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by: danaseamanPosted on 2009-03-04 at 04:27:43ID: 31553763

GetWindowInfo rctclient returns screen coordinates which is exactly what I needed.

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