Simple Code Work Nice On Window XP But Not On Windows 7

I am facing a very weird issue and found no clue why?

that's why i comes here for a reason for the issue..

let me explain; i am trying following code to run a process (Open Printer Preferences Window) and get the Window Handle For Further Processing, the code runs very fine as it should on windows xp environment, but when i try on windows 7 it stuck on the do while loop as MaindWindowHandle Only Returns 0.

here is the code:

Code:

---

        Dim objProcess As System.Diagnostics.Process
        Dim intHwnd As IntPtr
        objProcess = New System.Diagnostics.Process
        With objProcess.StartInfo
            .FileName = "rundll32"
            .Arguments = String.Format("printui.dll,PrintUIEntry /e /n {0}{1}{0}", Convert.ToChar(34), "EPSON L130 Series")
            .UseShellExecute = False
        End With
        objProcess.Start()
        Do While objProcess.MainWindowHandle = IntPtr.Zero //Windows 7 Execution Trapped In This Loop
            System.Threading.Thread.Sleep(500)
            objProcess.Refresh()
            My.Application.DoEvents()
        Loop
        intHwnd = objProcess.MainWindowHandle
        objProcess.Dispose()
        objProcess = Nothing
        MessageBox.Show(intHwnd.ToString)

---

any idea?

thanks in advance

best regards

Try this...

Code:

---

Dim objProcess As New Process
Dim intHwnd As IntPtr

With objProcess.StartInfo
    .FileName = "rundll32"
    .Arguments = String.Format("printui.dll,PrintUIEntry /e /n {0}{1}{0}", Convert.ToChar(34), "EPSON L130 Series")
    .UseShellExecute = False
End With
objProcess.Start()
objProcess.WaitForInputIdle()

intHwnd = objProcess.MainWindowHandle
objProcess.Dispose()

MessageBox.Show(intHwnd.ToString)

---

Quote:

---

Originally Posted by .paul.

Try this...

Code:

---

.....
objProcess.WaitForInputIdle()
.....

---

---

first of all thanks a lot for your kind reply, second sir, i am very sorry as i forgot to mention in my post that, after a google search i found that one, and tried that too.. but that didn't work either :( returning 0 as window handle :(

thanks again for your reply though...

Does the process you’re starting have a window?

Quote:

---

Originally Posted by .paul.

Does the process you’re starting have a window?

---

thanks for your reply sir..
yes sir, it does...

it the very same window/GUI interface if you right click on "Printer" and select "Printing Preferences"

best regards