SHEARDLGPARAMS

Summary

The SHEARDLGPARAMS structure provides information used to initialize the dialog box created by the L_DlgShear function. After the user closes the dialog box, this structure is updated with information about the user's selections.

Syntax

typedef struct _SHEARDLGPARAMS 
{ 
   L_UINT uStructSize; 
   pBITMAPHANDLE pBitmap; 
   L_INT nAngle; 
   L_BOOL bHorizontal; 
   COLORREF crBack; 
   L_UINT32 uDlgFlags; 
   LTCOMMDLGHELPCB pfnHelpCallback; 
   L_VOID *pHelpCallBackUserData; 
} SHEARDLGPARAMS,* LPSHEARDLGPARAMS ; 

Members

uStructSize

Size of this structure, in bytes. Use the sizeof operator to calculate this value.

pBitmap

Pointer to the bitmap handle that references the bitmap used for preview or processing.

nAngle

A variable to be updated with the angle or shear entered in the dialog. Positive values are for clockwise angles; negative values are for counterclockwise angles. The angle is expressed in hundredths of degrees. Possible values range from -4500 - 4500.

bHorizontal

A flag that indicates the shear direction. Possible values are:

crBack

A variable to be updated with the background fill color entered in the dialog. 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.

uDlgFlags

User interface flags for this dialog, which determine the layout and action of the dialog. Possible values are:

pfnHelpCallback

Pointer to an optional help callback function. If you do not wish to provide help to this dialog, use NULL as the value of this parameter. To provide help to this dialog, use the function pointer as the value of this parameter. The callback function must adhere to the prototype described in LTCOMMDLGHELPCB.

pHelpCallBackUserData

Void pointer that you can use to pass one or more additional parameters that the callback function needs. To use this feature, assign a value to a variable or create a structure that contains as many fields as you need. Then, in this parameter, pass the address of the variable or structure, casting it to L_VOID *. The callback function, which receives the address in its own pHelpCallBackUserData parameter, can cast it to a pointer of the appropriate data type to access your variable or structure. If the additional parameters are not needed, you can pass NULL in this parameter.

Usage

• L_DlgShear