An icon is a picture that consists of a bitmap image combined with a mask to create transparent areas in the picture. The term icon can refer to either of the following:
A single icon image. This is a resource of type RT_ICON.
A group of images, from which the system or an application can choose the most appropriate icon based on size and color depth. This is a resource of type RT_GROUP_ICON.
Draws an icon or cursor into the specified device context, performing the specified raster operations, and stretching or compressing the icon or cursor as specified.
Contains the scalable metrics associated with icons. This structure is used with the SystemParametersInfo function when the SPI_GETICONMETRICS or SPI_SETICONMETRICS action is specified.
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