How to fefine INVALID_HANDLE_VALUE in C#?

Question

In the follow code: hDevInfo = SetupDiGetClassDevs(ptrGUID null null DIGCF_PRESENT|DIGCF_DEVICEINTERFACE); if( hDevInfo == INVALID_HANDLE_VALUE) { MessageBox.Show(Can not get information set of this device class! ERROR MessageBoxButtons.OK MessageBoxIcon.Error); return; } how to define INVALID_HANDLE_VALUE in my c# code?

bilnaad · Answer

INVALID_HANDLE_VALUE is defined like #define INVALID_HANDLE_VALUE -1 INVALID_HANDLE_VALUE should be an IntPtr in C#. So I think you could define INVALID_HANDLE_VALUE as. INVALID_HANDLE_VALUE = new IntPtr(-1); I don't know for sure. I only hope ^_^