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c#.NET set focus on a window?

I have written a "sendKeys" app that works well.
I'd like to further its reliability by being able to set focus on expected windows/forms.
The desktop application is written in C#.
So, for example, if the app is ready to supply a username and password to a form who's title bar reads Intuit - Quickbooks Log On, how do I make sure that that window/form has the focus?
Thank you...

Dorababu M

Are you looking for this?

[DllImport("user32.dll")]
static extern bool SetForegroundWindow (IntPtr hWnd); 
private void BringToFront(Process pTemp)
{    SetForegroundWindow(pTemp.MainWindowHandle); }

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Sheldon Livingston

ASKER

Dorababu... how do I find the appropriate window handle? For example, I would want the log on window associated with the QuickBooks process.

Dorababu M

Can you show some code how you are opening up the quick books thing

Sheldon Livingston

ASKER

Yes...
System.Diagnostics.Process.Start("\"C:\\Program Files (x86)\\Inuit\\QuickBooks 2019\\QBW32.exe\"");

Dorababu M

You want the focus back to the form from you are opening?

Sheldon Livingston

ASKER

I want to make sure that I have the log on form has focus before I send the username and password.

I also want to do this periodically to make sure everything is working as planned.

Dorababu M

Can you try this as per required

DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool SetForegroundWindow(IntPtr hWnd);

private void button1_Click(object sender, EventArgs e)
{
   Process process = new Process();
   process.StartInfo.FileName = @"D:\LoadTest\WriteLines1.txt";
   process.Start();

   process.WaitForInputIdle();

   SetForegroundWindow(this.Handle);
}

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Sheldon Livingston

ASKER

The log on form was just an example... let's say I log in and want to create an account. I push the sendkeys to do that and now I want to make sure that I am at the "create account" screen before I start sending for keys...

ASKER CERTIFIED SOLUTION

Jonathan D.

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Sheldon Livingston

ASKER

@jonathan... although this looks pretty cool I don't see much documentation.
The issue seems to be that sometimes the main program opened loses focus... so I want to set focus back to the main program... particularly the username text box.
The help.chm file shows lots of things in the index, but no pages pop up on the right side.

Sheldon Livingston

ASKER

@Jonathan I implemented this solution and it appears to be working. Thank you!