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How can I change my code so that it runs correctly in Excel 32Bit & 64Bit?

Posted on 2016-08-23
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Last Modified: 2016-08-24
The following code fails when running in Excel 2010 64Bit
Can you modify the code so that it will run in both 32Bit & 64Bit environments?
Thanks

Public Declare Function OpenClipboard Lib "user32" (ByVal hwnd As Long) As Long
Public Declare Function EmptyClipboard Lib "user32" () As Long
Public Declare Function CloseClipboard Lib "user32" () As Long

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Question by:spar-kle
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Expert Comment

by:pony10us
ID: 41767212
Normally 32 bit would run on 64 bit but not the other way around however you can try something like this:

'Test for 64 bit version
#If Win64 Then
    Public Declare Function OpenClipboard Lib "user64" (ByVal hwnd As Long) As Long
    Public Declare Function EmptyClipboard Lib "user64" () As Long
    Public Declare Function CloseClipboard Lib "user64" () As Long
#Else
    Public Declare Function OpenClipboard Lib "user32" (ByVal hwnd As Long) As Long
    Public Declare Function EmptyClipboard Lib "user32" () As Long  
    Public Declare Function CloseClipboard Lib "user32" () As Long
#End If

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Author Comment

by:spar-kle
ID: 41767246
Thanks for your reply, however this still throws up an error.
I've attached a screen shot with the error message.
Error-Message.jpg
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Expert Comment

by:pony10us
ID: 41767258
According to Microsoft, you can ignore the error during the edit.  It isn't accurate.  It should still run okay.

For further information:  https://support.microsoft.com/en-us/kb/983043
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Author Comment

by:spar-kle
ID: 41767286
Thank you, however the error occurs when running the code...
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Accepted Solution

by:
pony10us earned 500 total points
ID: 41767451
Sorry, had to go to a meeting.  Also, I think I see my mistake in the code.

Try:

'Test for 64 bit version
#If Win64 Then
    Public Declare PtrSafe Function OpenClipboard Lib "user64" (ByVal hwnd As Long) As Long
    Public Declare PtrSafe Function EmptyClipboard Lib "user64" () As Long
    Public Declare PtrSafe Function CloseClipboard Lib "user64" () As Long
#Else
    Public Declare Function OpenClipboard Lib "user32" (ByVal hwnd As Long) As Long
    Public Declare Function EmptyClipboard Lib "user32" () As Long  
    Public Declare Function CloseClipboard Lib "user32" () As Long
#End If

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Assisted Solution

by:spar-kle
spar-kle earned 0 total points
ID: 41768327
Thanks for your answer
I found that I had to amend to "user32" in each instance so that it would work.
PtrSafe in the declaration is the key.
Thanks for your help
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Author Closing Comment

by:spar-kle
ID: 41768328
Appreciate your help
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LVL 26

Expert Comment

by:pony10us
ID: 41768946
Glad to assist.  I wasn't thinking real straight or would have caught my error on "user32" myself.  Glad you figured that part out.  :)
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