remove this ambiguity?

imran_rafique

please tell how to remove this error ? when i exceute these lines Process tmpProcess; .. IntPtr hWnd=tmpProcess->Handle; System::IntPtr::op_Explicit(hWnd); //***************************************************** last line recive following error plz tell how to remove this ambiguity ? //*********************************** errorr is that send_recive_messages.cpp(48) : error C2668: 'System::IntPtr::op_Explicit' : ambiguous call to overloaded function d:\final project\Copy (3) of Windows_processes_hwnd\hwnd_managment\Stdafx.h(7): could be '__int64 System::IntPtr::op_Explicit(System::IntPtr)' d:\final project\Copy (3) of Windows_processes_hwnd\hwnd_managment\Stdafx.h(7): or 'int System::IntPtr::op_Explicit(System::IntPtr)' d:\final project\Copy (3) of Windows_processes_hwnd\hwnd_managment\Stdafx.h(7): or 'void *System::IntPtr::op_Explicit(System::IntPtr)' r00d0034@yahoo.com

Nick Hodapp

First of all, your variable naming implies that you are expecting tmpProcess->Handle to be a window handle. It is not; it is a process handle. Also, in C++, since Process is a reference type, it must be declared as a pointer:

System::Diagnostics::Process* tmpProcess;

The op_Explicit() operator you are calling exists for implicit casting purposes in C# -- convert the value held by the IntPtr to an __int64, int, or void*. (Recall that the native size of the value of an IntPtr is determined by the platform; on 32bit hardware it is 32 bits, would be 64bits on 64bit hardware). I'll ask around, but I think in C++ it is impossible to disambiguate this function-call because in C++ it is illegal to overload a function based soely on its return type, which is what is happening here. You can get the same functionality by calling one of the conversion members: IntPtr::ToInt32(), IntPtr::ToInt64(), or IntPtr::ToPointer():

long l = hWnd->ToInt32();