Interop - Call a C++ dll into C#

[Lotus BV]

Hi,
I have a C++ DLL which returns char pointer
_DECL_SPEC unsigned char* getGrayImage()
{ return ucGrayImage;

I want this to be called in my C# application.
[DllImport(@"C:\Documents and Settings\IC006320\Desktop\getImage\Debug\GetImage. dll")]

What else should I do?

[MuhammadAsimSajjad]

hi

i was also in the same prolem few days back. But now i am out:
u can perfom following steps:

1. Copy your mfc dll in C# project's debug folder
2. Import dll

[DllImport(@"Debug\ABC.dll")]
static extern String getname(String s);


C++ mfc dll prototype
char* ABC::getname(char* stra)
{

char* abc;
//
// perform some work
//
return abc;
}

[Plater]

Some people have reported better luck marshalling a char* to a StringBuilder object. But with stringbuilders, you need to specify a default size or you'll get nothing back