Microsoft Excel

Ron de Bruin
Excel Automation

Microsoft MVP Program

StartUp Position UserForm

A UserForm object has a property named StartUpPosition. By default, this property is set to 1 (CenterOwner), which means that it should appear in the center of Excel's window. but if you use dual monitors this will not work correct in Windows.

For more info about this problem read this webpage for Excel for Windows

On a Mac we have a problem because setting StartUpPosition to 1 will not work like in Windows
because it will center on your Mac and not in center of the Excel window.

You can try the code below on a Mac to always open the userform in the center of your Excel window.
If correct it will also work if you have two monitors (please Let me know if this work correct)

The macro OpenUserform below will open a userform named "UserForm1"

Note: The macro also use the function named GetExcelPositionAndSize, copy both the macro
and the function in a normal module of your workbook.

Sub OpenUserform()
    Dim GetInfo As Variant
    GetInfo = GetExcelPositionAndSize(ActiveWorkbook.Name)
    If IsArray(GetInfo) Then
        With UserForm1    ' Name of the UserForm that you want to open
            .StartUpPosition = 0
            .Left = GetInfo(0) + (0.5 * (GetInfo(2) - GetInfo(0))) - (0.5 * .Width)
            .Top = GetInfo(1) + (0.5 * (GetInfo(3) - GetInfo(1))) - (0.5 * .Height)
        End With
        MsgBox GetInfo & " [No result - Is your window name correct?]"
    End If
End Sub

Function GetExcelPositionAndSize(ByVal WinName As String) As Variant
'Original Function created by BlueCactus, see :
'Returns the Left, Top coordinates, as well as Width, Height for a Excel window on a  Mac.
'Changed by Ron de Bruin on 18-Oct-2012

    Dim ScriptToRun As String, ScriptResult As String, MySplit As Variant

    ScriptToRun = "tell application """ & Application.Name & """" & Chr(13)
    ScriptToRun = ScriptToRun + "try" & Chr(13)
    ScriptToRun = ScriptToRun + "set rect to bounds of window """ & WinName & """" & Chr(13)
    ScriptToRun = ScriptToRun + "on error" & Chr(13)
    ScriptToRun = ScriptToRun + "set rect to ""error""" & Chr(13)
    ScriptToRun = ScriptToRun + "end try" & Chr(13)
    ScriptToRun = ScriptToRun + "end tell" & Chr(13)
    ScriptToRun = ScriptToRun + "return rect"

    ' ScriptResult will be set to "error" if the window name is bad.
    ScriptResult = MacScript(ScriptToRun)

    If ScriptResult <> "error" Then
        GetExcelPositionAndSize = Split(ScriptResult, Chr(44))
        GetExcelPositionAndSize = "error"
    End If
End Function