Minimizing Other Windows From DotNet Application

The Below Code in the Load Event Will Get the List of all Processes and Add it in the ComboBox

        For Each p As Process In Process.GetProcesses()
            If (ComboBox1.Items.Contains(p.ProcessName) = False) Then
                ComboBox1.Items.Add(p.ProcessName)
            End If
        Next

For the Minimize,Maximize and other functions  to Work We need to Define an API Method ShowWindow from user32.dll

     <DllImport("User32.dll")>_
    Public Shared Function ShowWindow(ByVal hwnd As IntPtr, ByVal cmd As Integer) As Boolean
    End Function

Once you have defined the API now its time to use it
Parameter Info
hwnd - The Window Handle on which the opperations will take place
cmd - An integer value which will hold the options wether to Minimise ,Maximise etc..

The Following Options can be used in the cmd parameter.

Hide = 0,
ShowNormal = 1,
ShowMinimized = 2,
ShowMaximized = 3,
Maximize = 3,
ShowNormalNoActivate = 4,
Show = 5,
Minimize = 6,
ShowMinNoActivate = 7,
ShowNoActivate = 8,
Restore = 9,
ShowDefault = 10,
ForceMinimized = 11*

Then I made a Button which will minimize all windows the code to Minimise all is

        For Each p As Process In Process.GetProcesses()
            ShowWindow(p.MainWindowHandle, 6)
        Next

Then I made a button which will minimize Process selected from the combobox

        Dim p() As Process = Process.GetProcessesByName(ComboBox1.SelectedItem)
        For Each pr As Process In p
            ShowWindow(pr.MainWindowHandle, 6) ' 6 used to Minimise
        Next

Then I made a button which will maximise the Process selected from the combobox

        Dim p() As Process = Process.GetProcessesByName(ComboBox1.SelectedItem)
        For Each pr As Process In p
            ShowWindow(pr.MainWindowHandle, 9) ' 9 used for Restoring
        Next

For More Demonstration you can download the Full Project