C call stack compromised

Hi all,

I'm facing a problem (6069, C call stack compromised) when trying to call functions in an external product DLL, followed by a progress session crash.

Function signature is : L_INT L_VersionInfo(pVersionInfo, uStructSize)

where pVersionInfo is a pointer to a structure, and uStructSize is the size of the structure.

Calling this function in C is OK, I'm declaring a variable, use memset to initialize it, and then call the function.

In 4GL, I'm declaring the function like this :

procedure L_VersionInfo external "xxx.dll" persistent:

define input parameter mStruct as memptr.

define input parameter sz as long.

define return parameter retVal as long.

end procedure.

The code to call the function declares a memptr, do a set-size with the value of sizeof(struct), and call the function. Which leads to the session crash...

I also tried using long parameter and get-pointer-value, without success.

Using CDECL option doesn't help too.

My question is : is there something I'm doing wrong when declaring or calling my function ? Or may it be related to the DLL itself ?

10.2A - Win32