Question

I can’t solve this problem.
I get an error:

The name 'hWnd' does not exist in the current context

It sounds very easy and probably is… sorry for asking so obvious questions.

Here’s my code:

public static IntPtr WinGetHandle(string wName)
{
    foreach (Process pList in Process.GetProcesses())
    {
        if (pList.MainWindowTitle.Contains(wName))
        {
            IntPtr hWnd = pList.MainWindowHandle;
        }
    }
    return hWnd;
}

I tried with many different ways and each fails.
Thanks in advance.

Answer 1

Update: See Richard’s Answer for a more elegant approach.

Don’t forget you’re declaring you hWnd inside the loop – which means it’s only visible inside the loop. What happens if the window title doesn’t exist? If you want to do it with a for you should declare it outside your loop, set it inside the loop then return it…

IntPtr hWnd = IntPtr.Zero;
foreach (Process pList in Process.GetProcesses())
{
    if (pList.MainWindowTitle.Contains(wName))
    {
        hWnd = pList.MainWindowHandle;
    }
}
return hWnd; //Should contain the handle but may be zero if the title doesn't match

Or in a more LINQ-y way….

IntPtr? handle = Process
    .GetProcesses()
    .SingleOrDefault(x => x.MainWindowTitle.Contains(wName))
    ?.Handle;
return handle.HasValue ? handle.Value : IntPtr.Zero