Can i use api to find a variable Pointer

[ashthud]

In foxpro 2.6 i can pass variables by reference using @; so i know pointer information is somewhere flying about...
Is there an api function or maybe just a standard foxpro THING that i can do to find the pointer (in memory) of my variable?

Maybe its a case of passing my variable to a dll that then returns the pointer(????). Thanks.

 

[ezopaci]

You can return string to fox very simple

http://msdn.microsoft.com/en-us/library/tz9zk0sc(VS.80).aspx

But you need compile your DLL like FLL library. Then you can use all Foxpro API functions.
FLL is practically DLL with some addendum.

How to compile FLL ?

http://www.utmag.com/ViewPageArticl...1716A5738483375412F6249754B4E626E614E72413D3D

http://www.utmag.com/ViewPageArticl...13749614375433263494469304C79694A696536513D3D

http://www.utmag.com/wconnect/wc.dll?9,7,10,654

http://www.dfpug.de/konf/konf_1995/oop/SessionE-C++.htm

http://www.tek-tips.com/faqs.cfm?fid=6347

If you can not compile FLL, you can still allocate some memory on the heap (by WinAPI) in the fox, get the pointer and send it to the DLL.


Tomas

 

[ashthud]

OMG tomas, you solved my problem, but indirectly!!!

allocate some memory on the heap

At first i changed my function (that allows calls to 32bit apps) to allow byref parameters. But didn't give the variable enough space to write to:

I had:
var = ""
=dllcall("GetWindowText","vhwnd,var,256")
?var

Is now:
var = REPL(" ", 256)
=dllcall("GetWindowText","vhwnd,var,256")
?var

Ashthud