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Tip of the Day
Language: Visual Basic
Expertise: Intermediate
Aug 6, 1997

A Taskbar-Compliant Version of Centerform

To center a form, you only need one API call, no UDTs, and two constants. This solution is based on the fact that GetSystemMetrics reflects real estate taken up by the taskbar and the Microsoft Office shortcut bar:
 
Public Const SM_CXFULLSCREEN = 16
Public Const SM_CYFULLSCREEN = 17

#If Win32 then
        Declare Function GetSystemMetrics _
                Lib "user32" _
                (ByVal nIndex As Long) As Long
#Else
        Declare Function GetSystemMetrics _
                Lib "User" _
                (ByVal nIndex As Integer) _
                As Integer
#End If

Public Sub CenterForm(frm As Form)
        frm.Left = Screen.TwipsPerPixelX * _
                GetSystemMetrics_
                        (SM_CXFULLSCREEN) / 2 _
                        - frm.Width / 2
        frm.Top = Screen.TwipsPerPixelY * _
                GetSystemMetrics_
                (SM_CYFULLSCREEN) / 2 _
                - frm.Height / 2
End Sub
Dave Michel
 
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