SAMPLE: GDI Region, Clipping, and Bitmap Functions

• Microsoft Windows Software Development Kit (SDK) for Windows version 3.1

JIGSAW: Demonstrates GDI Region, Clipping, and Bitmap Functions

JIGSAW uses region functions (CreateRectRgn, CombineRgn, SetRectRgn), clipping functions (SelectClipRgn), and bitmap functions (BitBlt) from the Microsoft(R) Windows(TM) graphics device interface (GDI) to simulate a jigsaw puzzle.

These functions use less memory and fewer resources than individual picture box controls to display and move the different pieces of the puzzle around the window.

Region functions create, alter, and retrieve information about regions that can be filled with graphical output. You can use region functions with clipping functions to create clipping regions. A clipping region is a portion of a window where GDI creates output. If you send output to an area of a window outside a clipping region, the output will not be visible. Bitmap functions display bitmaps; these functions let you prepare images in memory and then copy the images to the display.

To load JIGSAW files in the Visual Basic(TM) environment, run VB.EXE, choose Open Project from the File menu, and select the JIGSAW.MAK file. You can also make an executable file and run it as a separate program using the Visual Basic run-time file VBRUN200.DLL.

JIGSAW was built with Microsoft Visual Basic version 3.0 and tested under Microsoft Windows version 3.1.

Download JIGSAW.EXE, a self-extracting file, from the Microsoft Software Library (MSL) on the following services:

• Microsoft Download Service (MSDL)

        Dial (206) 936-6735 to connect to MSDL
        Download JIGSAW.EXE (size: 25580 bytes) 
  

• Internet (anonymous FTP)

        ftp ftp.microsoft.com
        Change to the \SOFTLIB\MSLFILES directory
        Get JIGSAW.EXE (size: 25580 bytes)