Problem getting string from memory address

I am using Event() to capture a Windows API message sent to my WinDev (20) application.

The event capture works well, I get the MessageID and the HWnd id but I can't retrieve the message string.

In my test I am simply sending "Hello" as UniCode terminated with character 0.

PROCEDURE EventDataCapture(nMessageID is int, nHWnd is system int , nMessagePointer is system int)

sMessage is string on 6

sMessage = StringRetrieve(nMessagePointer,srUNICODEAddress)   // Crashes WinDev - Unexpected internal error
sMessage = StringRetrieve(&nMessagePointer,srUNICODEAddress)   // Returns "??????"

Transfer(&sMessage,nMessagePointer,5)			// Says Bad Source It does not match a valid memory address in read mode.
Transfer(&sMessage,&nMessagePointer,5)			// Produces "Á??‡"

I know that nMessagePointer is the same value as when it left the sending application, so it seems to be an issue with WinDev accessing the memory address.

Any ideas?


Gary