L_BM_SHEAR

Send this message to move the corners of an L_BITMAPCLASS window's bitmap in the fashion of a parallelogram.

You specify an angle of slant, horizontal or vertical shear, and the fill color for the created space. The following are horizontal and vertical examples:

$image\shear.gif$

Parameter	Meaning
wParam	Reserved. Set to NULL
lParam	Points to a LEADBITMAPSHEAR structure. For a description, refer to the LEADBITMAPSHEAR Structure described below.

Returns

SUCCESS	Function was successful.
< 0	An error occurred. Refer to Return Codes.

LEADBITMAPSHEAR Structure

The L_BM_SHEAR message lets you move the corners of an L_BITMAPCLASS window's bitmap in the fashion of a parallelogram. Before sending the message, your program must declare a LEADBITMAPSHEAR structure and update its required fields. The following table describes the fields in the structure, using MyShear as the name of the LEADBITMAPSHEAR structure:

Sample Field Name	Data Type	Description
MyShear.uStructSize	L_UINT	Size of the LEADBITMAPSHEAR structure. This field allows for compatibility with future enhancements. It can be specified as follows: MyShear.uStructSize = sizeof(MyShear);
MyShear.nAngle	L_INT	The angle of slant. Positive values are for clockwise angles; negative values are for counterclockwise angles.
MyShear.fHorizontal	L_BOOL	TRUE for horizontal shear, or FALSE for vertical shear.
MyShear.crFill	COLORREF	The COLORREF value that specifies the fill color. You can assign the value using the Windows RGB macro.