PtrSafe keyword
The PtrSafe keyword is used in this context: Declare statement.
Declare statements with the PtrSafe keyword is the recommended syntax. 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.
To ensure backwards compatibility with VBA version 6 and earlier, use the following construct:
#If VBA7 Then
Declare PtrSafe Sub...
#Else
Declare Sub...
#EndIf
When running in 64-bit versions of Office, Declare statements must include the PtrSafe keyword. The PtrSafe keyword asserts that a Declare statement is safe to run in 64-bit development environments.
Adding the PtrSafe keyword to a Declare statement only signifies that the Declare statement explicitly targets 64-bits. All data types within the statement that need to store 64-bits (including return values and parameters) must still be modified to hold 64-bit quantities by using either LongLong for 64-bit integrals or LongPtr for pointers and handles.
See also
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