Problem with code using 64 bit system

[CJ-22]

I have just started using a 64 bit laptop. I get an unusual error involving a Private Declare Function only on the 64 bit system. The error says, "Compile error: The code in this project must be updated for use on 64-bit systems. Please review and update Declare statements and then mark them with the PtrSafe attribute." I am unsure how to fix this problem and was hoping someone could help. Here is the code that is highlighted after the error:

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I am still very new to Visual Basic and can't figure this out. Any help is appreciated.

Thanks.

[scott.s.fower]

I don't know for sure, but can you change kernel32 to kernel64?

[CJ-22]

Thanks for the suggestions, but I still get the same error.

[J450n]

Try changing long to Longptr, see here http://msdn.microsoft.com/en-us/libr.../gg264421.aspx

hope this helps

[Leith Ross]

Hello CJ-22,

This will work...

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[shg]

Why not just use VBA's native ChDrive and ChDir instead of API?

[CJ-22]

Thanks for all the help. I simply added "PtrSafe" before Function and the error went away.

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Don't know why, but it now works. Thanks for all the help.

[shg]

Begs the question, but congratulations.

[Leith Ross]

Hello CJ-22,

Calls to 64-bit Windows API functions from 32-bit solutions (and the opposite) may lead to erratic behavior or system crashes resulting from the truncation of data or overflows into protected memory spaces. To ensure this does not happen, you should use the PtrSafe keyword. in the Declarations statement. Declare statements that include PtrSafe work correctly in the VBA7 development environment on both 32-bit and 64-bit platforms only after all data types in the Declare statement (parameters and return values) that need to store 64-bit quantities are updated to use LongLong for 64-bit integrals or LongPtr for pointers and handles.