Background Colors Affect BitBlt() from Mono to Color

 Last reviewed: November 2, 1995
Article ID: Q41464
The information in this article applies to:
  • Microsoft Windows Software Development Kit (SDK) for Windows versions 3.1 and 3.0
  • Microsoft Win32 Application Programming Interface (API) included with: 

        - Microsoft Windows NT versions 3.5 and 3.51
    - Microsoft Windows 95 version 4.0

When using BitBlt() to convert a monochrome bitmap to a color bitmap, GDI transforms all white bits (1) to the background color of the destination device context (DC). GDI transforms all black bits (0) to the text (or foreground) color of the destination DC.

When using BitBlt() to convert a color bitmap to a monochrome bitmap, GDI sets to white (1) all pixels that match the background color of the source DC. All other bits are set to black (0).

These features are mentioned in the BitBlt() documentation. manual.

Additional reference words: 3.00 3.10 3.50 4.00 95
KBCategory: kbgraphic
KBSubcategory: GdiBmp

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Last reviewed: November 2, 1995
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