public static extern int MyDllFunction(
int param1,
// We want this to become a C-style boolean
// (false == 0, true != 0)
[MarshalAs(UnmanagedType.Bool)]
bool param2,
// We want the dll to write to our struct, and to be
// able to get the data written to it back we need to
// specify the Out-attribute. If we were just feeding the
// parameter to the dll we could just use the In-attribute
// instead, or combine them if we want to achieve both.
[Out, MarshalAs(UnmanagedType.LPStruct)]
MyDllStruct resultStruct
);
// Calls the MyDllInterface.MyDllFunction and returns
// the resulting struct. If an error occured, an
// exception is thrown.
public MyDllStruct CallFunction(int param1, bool param2)
{
MyDllStruct result = new MyDllStruct();
int errorCode = MyDllInterface.MyDllFunction(
param1, param2, result);
if (errorCode < 0)
{
throw new Exception(String.Format(
"We got an error with code {0}. Message: ",
errorCode, MyDllInterface.mydll_get_errormsg()));
}
return(result);
}
