C++ Access violation when calling dll function
- by Manjoor
I have a function definition in my VC++ Win32 DLL
DEMO2_API void ProcessData(char* i_buff, unsigned short i_len, char* o_buf,
unsigned *o_len, unsigned short *errorCode)
{
__describe (i_buff,&i_len,o_buf,o_len,errorCode);
}
This dll function is called by a c# application.
When called, it generate access violation exception.
After reasearching i found, the cause for my problem.
http://social.msdn.microsoft.com/Forums/en-US/csharplanguage/thread/6e843243-baf4-4eb1-8a20-c691ad47762c
But could not understand what exactly they are doinng in example code.
Can someone explain it so me?
And what would be P/Invoke signature in c# after externally allocating memory?
