Call API crash

Question

IGWFolderRights *gwFolderRights NULL;
DIGWAddress *gwAddressD = NULL;
status = gwFolderRights->get_Address(&gwAddressD);
I call that sometime crash in windows vista, then I tried catch this exception as below, but didn's work, still crash at here. use try{} catch{} too.
long int
TryGetAddress(IGWFolderRights *gwFolderRights, DIGWAddress **gwAddressD)
long int status;
__try
status = gwFolderRights->get_Address(gwAddressD);
__except(1)
status = -1;
return status;
Is there a problem? Thanks very much!

Answer 1

Probably you are not using [DllImport] attribute correctly. Show the details about the C# part.
Since the DLL is built wit /clr option, then a different approach is possible: create a managed class like this:
public ref class MyClass
public:
    static void Test()
It does not require __declspec.
In C#, add a reference to DLL, then call the function:
“MyClass.Test()”. If it works, then add more code to Test, such as
TestCheckVersion().