how Save a BitMap in 8,16,32 bits

hi guys,
i have a problem with my project
in this momment im trying to save a bitmap with this syntax
the app is in VB.NET (VS 2010)

Private Function getImage(rect As Rectangle, penWidth As Integer)
Dim bitmap As New Bitmap(rect.Width, rect.Height)
Dim brush As New SolidBrush(Color.White)
Dim graphics As Graphics
graphics = graphics.FromImage(bitmap)
graphics.FillRectangle(brush, 0, 0, rect.Width, rect.Height)

Then i save the bitmap:

bitmap.Save(saveLocation, Imaging.ImageFormat.bmp)

then in other Application developed in VB 6.0

i trying to generate a Report with the image Saved.

i use this syntax in the VB 6.0 App

Printer.paintPicture LoadPicture(Savedlocation,....)

then is in the line shown above when the Error:
"Invalid Pucture"
i think . is a problem with the Bits of Bitmap... i think

thanks por the help
regards from Mexico

Tags: Visual Basic, Graphics