Color.GetA method

Applies to: desktop apps only

The Color::GetA method gets the alpha component of this Color object.

Syntax

BYTE GetA();

Parameters

This method has no parameters.

Return value

Type:

Type: BYTE

This method returns the alpha component of this color.

Examples

The following example creates a Color object, gets the alpha component of the color, and creates a second Color object that uses the same alpha component. It then fills a rectangle by using a Brush object based on the second color.

VOID Example_GetA(HDC hdc)
{
   Graphics graphics(hdc);

   // Create a Color object with an alpha value of 128.
   Color firstColor(128, 255, 0, 0);

   // Get the alpha value of firstColor.
   char alpha = firstColor.GetA();

   // Create a second Color object with an alpha value taken from firstColor.
   Color secondColor(alpha, 0, 0, 255);

   // Create a pen using secondColor and use it to draw a line.
   Pen pen((secondColor), 20);    
   graphics.DrawLine(&pen, 50, 50, 200, 50);
}

Requirements

See also

Color

Color::GetAlpha

Color::GetB

Color::GetBlue

Color::GetG

Color::GetGreen

Color::GetR

Color::GetRed

Color::GetValue

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Build date: 3/6/2012