Region Data Creator CreateRgn.exe lets you create region data usable by the plugin. The region data created is compatible with the Win32 API function ExtCreateRegion(), so you can use CreateRgn.exe for your own GDI programs if you want. Creating region data for use with the plugin is simple:
More info: After loading a bitmap, it will appear "attached" to the right side of the Region Creator window. This is the bitmap display window. To re-center the bitmap on the screen, you can click anywhere on the Region Creator window and drag it to a new location. When you move the mouse over the bitmap, the cursor changes to an eyedropper and the color of the highlited pixel is shown on the bottom of the Region Creator window. When you click on a pixel in the bitmap, the selected color is used to generate region data, which is automatically applied to the bitmap display window. Once you have created at least one transparent region, you can right-clicking on the bitmap let you do Boolean combinations with the exiting region. The most useful of these is "And", which adds a new color to the transparent region. Region Creator Buttons
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