COLORRESDLGPARAMS

Summary

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

Syntax

typedef struct _COLORRESDLGPARAMS 
{ 
   L_UINT uStructSize; 
   pBITMAPHANDLE pBitmap; 
   L_BOOL bZoomToFit; 
   L_INT nBitsPerPixel; 
   L_UINT32 uColorResFlags; 
   HPALETTE hpalCustom; 
   L_UINT32 uDlgFlags; 
   L_UINT32 uDlgFlagsEx; 
   LTCOMMDLGHELPCB pfnHelpCallback; 
   L_VOID *pHelpCallBackUserData; 
} COLORRESDLGPARAMS,* LPCOLORRESDLGPARAMS ; 

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.

bZoomToFit

Flag that indicates the initial zoom level for previewing the image. Possible values are:

nBitsPerPixel

A variable to be updated with the bits per pixel value entered in the dialog. Set this to indicate the initial value for the dialog.

uColorResFlags

A variable to be updated with the color resolution flags entered through the dialog. Setting this before calling the function has no effect. This will be one of the following:

hpalCustom

A handle to a palette to be updated with a custom palette entered through the dialog. This member is valid only when CRF_USERHPALETTE is set in uColorResFlags.

uDlgFlags

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

uDlgFlagsEx

User interface flags for this dialog, which determine the options available in 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_DlgColorRes