PixelFormat.Format32bppArgb causing exception

[Niya]

Put a Label and a Timer on a Form and try this code:-

Public Class Form1
    Private g_cnt As Integer
 
    Private Function ResizeBitmap(ByVal bmp As Bitmap, ByVal newSize As Size) As Bitmap
        Return New Bitmap(bmp, newSize)
    End Function
 
    Private Function GetScreenCapture(ByVal rect As Rectangle) As Bitmap
 
        Dim bmp As New Bitmap(rect.Width, rect.Height)
 
        Dim g As Graphics = Graphics.FromImage(bmp)
 
        g.CopyFromScreen(rect.X, rect.Y, 0, 0, rect.Size)
 
        Return bmp
    End Function
 
 
    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        Dim cap = GetScreenCapture(New Rectangle(0, 0, 400, 400))
 
        cap = ResizeBitmap(cap, Me.Size)
 
        Me.BackgroundImage = cap
 
        g_cnt += 1
 
        Label1.Text = g_cnt.ToString
 
    End Sub
End Class

I set the Timer to 255. That code does a partial screen capture every time the Timer fires and it works fine for me with no errors. Why don't you try it out and see if it works for you as well.