i try wit 3 argument ,got same error
[DllImport(@"C:\Mach4Hobby\Mach4IPC.dll", EntryPoint = "mcRegGetHandle")]
public static extern int mcRegGetHandle(int mlnst, string regname,int hReg);
private void manualloading(object sender, RoutedEventArgs e)
{
int hreg = 0;
int debug= mcRegGetHandle(0, "gRegs0/auto",hreg);
}