HALFTONEDLGPARAMS

typedef struct _HALFTONEDLGPARAMS
{
   L_UINT uStructSize;
   pBITMAPHANDLE pBitmap;
   L_BOOL bZoomToFit;
   L_UINT uDim;
   L_INT nAngle;
   L_UINT32 uType;
   LPDLGBITMAPLIST pBitmapList ;
   L_UINT *   puInListIndexes ;
   L_INT32   nInCount ;
   HBITMAPLIST hList ;
   L_UINT32 uDlgFlags;
   LPPOINT pptPosition;
   LTCOMMDLGHELPCB pfnHelpCallback;
   L_VOID  *pHelpCallBackUserData;
} HALFTONEDLGPARAMS,  * LPHALFTONEDLGPARAMS;

The HALFTONEDLGPARAMS structure provides information used to initialize the dialog box created by the LDialogColor::DoModalHalftone function. After the user closes the dialog box, information about the user's selections are updated in this structure.

Member	Description
uStructSize	Size of this structure, in bytes. Use the sizeof operator to calculate this value.
pBitmap	Ignored.
bZoomToFit	Flag that indicates the initial zoom level for previewing the image. Possible values are:
	Value	Meaning
	TRUE	Set the initial zoom level to "Zoom to fit".
	FALSE	Set the initial zoom level to "Normal (1:1)".

uDim	Value that indicates the size of the grain. Possible values range form 2 to 100. This value is ignored if uType is HT_VIEW or HT_PRINT. If uType is not HT_VIEW or HT_PRINT, uDim should be >= 1.
nAngle	The angle of rotation, expressed in hundredths of degrees. Possible values range from -36000 to 36000. A value of 0 produces a horizontal halftone pattern. This parameter specifies the number of degrees to change the pattern. Positive values rotate the pattern clockwise; negative values rotate the pattern counterclockwise. This value is ignored if uType is HT_RECT, HT_CIRC, HT_RAND or HT_USERDEF.
uType	Value that represents the halftone pattern. Possible values are:
	Value	Meaning
	HT_PRINT	[0x0000] Halftone for printing
	HT_VIEW	[0x0001] Halftone for display
	HT_RECT	[0x0002] Rectangular halftone
	HT_CIRC	[0x0003] Circular halftone
	HT_ELLIPS	[0x0004] Elliptical halftone
	HT_RAND	[0x0005] Random halftone
	HT_LINEAR	[0x0006] Linear halftone
	HT_USERDEF	[0x0007] User defined halftone
pBitmapList	Pointer to a DLGBITMAPLIST structure that contains the bitmaps to halftone. Setting this before calling the LDialogColor::DoModalHalfTone function will initialize the "Available List" in the dialog. The pszDescription member of the DLGBITMAPLIST structure will be used to fill the "Available List" field(s) and the pszFileName member of the DLGBITMAPLIST structure is ignored. If NULL the HT_USERDEF and controls releated to this option will be hidden.
puInListIndexes	An array of indexes into the pBitmapList array of bitmaps. (The value in puInListIndexes[i] is the index into the pBitmapList array.) The bitmaps referenced by the indexes in this list will be included in the "Selected List" when the Halftone Dialog is first displayed. If you pass NULL "Selected List" will be empty.
nInCount	Number of items in the puInListIndexes array.
hList	Handle to the list of bitmaps which will contains all the bitmaps in the "Selected List" and that will be used in half toning if the HT_USERDEF option is selected, this member should be created throw CreateBitmapList before calling the dialog, and it is the user responsibility to destroy this list. Note:This member will be ignored if the pBitmapList value NULL.

uDlgFlags	User interface flags for this dialog, which determine the layout and action of the dialog. Possible values are:
	Value	Meaning
	DLG_HALFTONE_SHOW_CONTEXTHELP	[0x00000002] dialog should contain a context sensitive help icon.
pptPosition
pfnHelpCallback	Ignored.
pHelpCallBackUserData	Ignored.