Moves the corners of the class object's bitmap in the fashion of a parallelogram.


#include "ltwrappr.h"

virtual L_INT LBitmapBase::Shear(nAngle, bHorizontal=TRUE, crFill=0)


L_INT nAngle

The angle of slant. Positive values are for clockwise angles; negative values are for counterclockwise angles. The angle is expressed in hundredths of degrees, with a limit of 4500 (45 degrees).

L_BOOL bHorizontal

Flag that indicates the direction of the shear. Possible values are:

Value Meaning
TRUE Horizontal shear.
FALSE Vertical shear.


The COLORREF value that specifies the fill color. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color.


Value Meaning
SUCCESS The function was successful.
< 1 An error occurred. Refer to Return Codes.


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

For an example, click here

The angle is expressed in hundredths of degrees, with a limit of 4500 (45 degrees).

To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallBack.

This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.

Shear Function - Before

Shear Function - Before

Shear Function - After

Shear Function - After

View additional platform support for this Shear function.

Required DLLs and Libraries


Win32, x64.

See Also




L_INT LBitmapBase__ShearExample() 
   L_INT nRet; 
   LBitmapBase MyBitmap; 
   nRet =MyBitmap.Load(); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =MyBitmap.Shear(2200,FALSE, RGB(220,120,220)); 
   if(nRet !=SUCCESS) 
      return nRet; 
   return SUCCESS; 
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