getting and changing pixel colors

[Silvertine]

is there any way to check in a picbox if a pixel is painted over more than once and then change the color?

Use can use GetPixel and SetPixel API's to read and draw pixels.

Private Declare Function GetPixel Lib "gdi32" Alias "GetPixel" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long) As Long
Private Declare Function SetPixel Lib "gdi32" Alias "SetPixel" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal crColor As Long) As Long

Usage

'Get a Pixel
lColour = GetPixel(Picture1.hDC, 5, 5)

'Draw a Pixel
SetPixel(Picture1.hDC, 5, 5)

[Silvertine]

how do i check if a pixel has been painted over more than once?

You would have to have a timer constantly monitoring it. for example sake, let's assume the Pixel should normally be coloured blue.

Private Sub Timer1_Timer()
    lColour = GetPixel(Picture1.hDC, 5, 5)
    If lColour <> vbBlue Then   '<--the colour has changed
End Sub

[Silvertine]

No one knows how to check if a pixel has been painted over more than once?

[oetje]

Silvertine, the code that Megatron gave you is the best you can have for this. There's no better way. Sorry.