error in vb6 program!

HI NG,


i have been working on a vb6 project for 5 years. Now, the program crashes,
but on other pcs and other Windows OS it works correctly.
I've learned that the problem is caused by a kernel32 API.

HeapFree GetProcessHeap(), 0, pASTAT

Public Declare Function GetProcessHeap Lib "kernel32" () As Long



Public Declare Function HeapAlloc Lib "kernel32" _
(ByVal hHeap As Long, ByVal dwFlags As Long, _
ByVal dwBytes As Long) As Long
Public Declare Function HeapFree Lib "kernel32" _
(ByVal hHeap As Long, _
ByVal dwFlags As Long, _
lpMem As Any) As Long

----------------------------------------------------------------------
is there a possibility to write this in another way? Why doesn't the
SourceCode work anymore. I've installed XPSP2RC2 and Windows Media Player10b
Can you help me?
The weired thing is, that the error only appears in the ready-compiled exe
file, but not in the vb6 env.

Mfg

CS