Maximize form but do not cover the taskbar

Question

When I click the button to maximize my form, it covers the entire screen including the taskbar. I managed to find a solution and it works, I used my code in form load event but I cannot return the form into normal state.

Private Sub frmDashboard_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Me.Top = Screen.PrimaryScreen.WorkingArea.Top
    Me.Left = Screen.PrimaryScreen.WorkingArea.Left
    Me.Height = Screen.PrimaryScreen.WorkingArea.Height
    Me.Width = Screen.PrimaryScreen.WorkingArea.Width        
End Sub

Private Sub btnMaximizeMin_Click(sender As Object, e As EventArgs) Handles btnMaxMin.Click
    If Me.WindowState = FormWindowState.Normal Then
        'maximize but dont cover taskbar
        Me.Top = Screen.PrimaryScreen.WorkingArea.Top
        Me.Left = Screen.PrimaryScreen.WorkingArea.Left
        Me.Height = Screen.PrimaryScreen.WorkingArea.Height
        Me.Width = Screen.PrimaryScreen.WorkingArea.Width
    Else
        Me.WindowState = FormWindowState.Normal
    End If
End Sub

Answer 1

The problem is that you aren't maximising the form. You specifically DON'T want to maximise the form because that covers the Windows Task Bar. You can't set the WindowState "back" to Normal because it's already in that state, because it never leaves that state. It's up to you to remember the state for yourself and also the previous bounds, e.g.

Private isMaximised As Boolean = False
Private normalBounds As Rectangle

Private Sub MaximiseOrRestore()
    isMaximised = Not isMaximised

    If isMaximised Then
        normalBounds = Bounds
        Bounds = Screen.PrimaryScreen.WorkingArea
    Else
        Bounds = normalBounds
    End If
End Sub