JPEGWEBTUNERDLGPARAMS

typedef struct _JPEGWEBTUNERDLGPARAMS
{
   L_UINT uStructSize;
   pBITMAPHANDLE pBitmap;
   L_BOOL bZoomToFit;
   L_INT nQuality;
   L_INT nFormat;
   L_BOOL bProgressive;
   L_BOOL bWithStamp;
   L_UINT32 uDlgFlags;
   LTCOMMDLGHELPCB pfnHelpCallback;
   L_VOID *pHelpCallBackUserData;
} JPEGWEBTUNERDLGPARAMS, * LPJPEGWEBTUNERDLGPARAMS;

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

Member	Description
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:
	Value	Meaning
	TRUE	Set the initial zoom level to "Zoom to fit".
	FALSE	Set the initial zoom level to "Normal (1:1)".
nQuality	Value that indicates the degree of loss in the compression process. Valid values are between 2 (highest quality) and 255 (smallest file size) For more information, refer to the Compression Quality Factors.

nFormat	Value that indicates the sub format to use. Possible values are:
	Value	Meaning
	FILE_JFIF	JPEG File Interchange Format with YUV 4:4:4 color space and Lossless
	FILE_LEAD1JFIF	JPEG File Interchange Format with YUV 4:2:2 color space
	FILE_LEAD2JFIF	JPEG File Interchange Format with YUV 4:1:1 color space

bProgressive	Flag that indicates whether to save the JPEG image as a progressive image. Progressive images are useful when transmitting images, because the first part of the file contains the full dimensions of the image. Therefore, in a paint-while-load routine, you can display the whole image, and then progressively clarify it as the rest of the file loads. Possible values are:
	Value	Meaning
	TRUE	Save the JPEG image as a progressive image.
	FALSE	Do not save the JPEG image as a progressive image.
bWithStamp	Flag that indicates whether to save the image with a stamp. A stamp is a small thumbnail image saved in addition to the normal image in same file. Possible values are:
	Value	Meaning
	TRUE	Save the image with a stamp.
	FALSE	Save the image without a stamp.

uDlgFlags	User interface flags for this dialog, which determine the layout and action of the dialog. Possible values are:
	Value	Meaning
	DLG_JPEGWEBTUNER_SHOW_CONTEXTHELP	[0x00000001] Dialog should contain a context sensitive help icon.
	DLG_JPEGWEBTUNER_SHOW_PREVIEW	[0x00000002] Show a preview of the image in the dialog. The pBitmap member of this structure should contain a valid bitmap.
	DLG_JPEGWEBTUNER_SHOW_TOOL_ZOOMLEVEL	[0x00000004] Show the "Zoom to fit" and "Zoom Normal" toolbar buttons. The DLG_JPEGWEBTUNER_SHOW_PREVIEW flag must be set in order to show these buttons.
	DLG_JPEGWEBTUNER_SHOW_INFORMATION	[0x00000008] Show the Information group of controls.
	DLG_JPEGWEBTUNER_SHOW_SAVETHUMBNAIL	[0x00000010] Show the Save Thumbnail control.
	DLG_JPEGWEBTUNER_SHOW_OPTIONS	[0x00000100] Show the Options group of controls.
	DLG_JPEGWEBTUNER_SHOW_EXPORT	[0x00000200] Show the Export button instead of the OK button.
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.