LAnnPoint::GetTransparentColor

COLORREF * pcrTransparent;

/* address of a variable to be updated */

Parameter

Description

pcrTransparent

Address of a COLORREF variable to be updated with the transparent color. The standard Windows values for COLORREF represent either red, green, and blue color values, or an index into the bitmap's palette. A COLORREF value with the format 0x00BBGGRR represents the blue, green, and red color values for the specified pixel, where 0xBB is the blue value, 0xGG is the green value and 0xRR is the red value. If 0x01000000 is set in the COLORREF value (0x010000ZZ), the lower 8 bits (0xZZ) represent an index into the bitmap's palette, which holds the color value. These COLORREF values can be used with any Windows function and macro that takes a COLORREF parameter.

In the Document/Medical toolkits, the COLORREF value may represent a 16-bit grayscale value if pBitmap is a 12 or 16-bit grayscale bitmap. So that the value is not confused with an RGB value, the COLORREF_GRAY16 mask (0x04000000) is set. In this case (0x0400YYYY), the lower 16 bits (0xYYYY) of the COLORREF value represent the 16-bit grayscale value. (0x0400FFFF is 16-bit white and 0x04000000is 16-bit black.) This is not a standard Windows value. Therefore, LEADTOOLS functions will recognize a COLORREF having this format, but Windows functions will not. For information on how to use a 16-bit grayscale COLORREF in a non-LEADTOOLS function, refer to LBitmapBase::GetPixelColor.

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

LTANN

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Functions:

LAnnPoint::SetTransparentColor, LAnnPoint::SetTransparent

Topics:

Annotation Functions: Object Properties

Annotation Objects - Default Values

Annotation Objects - Automated Features

Displaying and Manipulating Annotation Objects

Using Color Values in LEADTOOLS