Marshal.GetLastWin32Error errors

[Alex]

Hello,

I have a problem with Marshal.GetLastWin32Error()
Every call returns 127 (ERROR_PROC_NOT_FOUND) even if the previous call was successful.

For example, given:

namespace Utils
{
public class Win32
{
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
}
}

And this code:

int rc;
IntPtr hwnd = Win32.FindWindow("something", "something else");
rc = Marshal.GetLastWin32Error();

The call to FindWindow() succeeds (hwnd gets a non-null value)
but Marshal.GetLastWin32Error() returns 127.

What am I doing wrong?

Thanks,
Alex.

 

[Mattias Sjögren]

What am I doing wrong?

GetLastWin32Error is only relevant if the previously called function
failed. If it succeeds, there's no point in calling GetLastWin32Error.



Mattias