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)".

nValue

Amount of stretching, where positive values stretch the pixels toward edges, and negative values stretch the pixels toward the center. Possible values range from –500 to 500.

ptCenter

A POINT structure that contains the center of the arc. This is ignored when either BND_HORZ or BND_VERT is set in the uBendingFlags member. The center point must be defined inside the bitmap or inside the region, if the bitmap has a region.

crFill

The COLORREF value that specifies the fill color for any exposed areas. 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.

uBendingFlags

Flags that indicate how to handle peripherally exposed areas, how to handle centrally exposed areas and the type of bending. You can use a bitwise OR (|) to specify one flag from each group.

The following are the flags that indicate how to handle peripherally exposed areas:

Value

Meaning

FILL_CLR

[0x0000] fill exposed areas with the color in crFill.

FILL_RPT

[0x0001] stretch the edges of the image to fill exposed areas.

FILL_NOCHG

[0x0002] do not change or process exposed areas.

The following are the flags that indicate how to handle an exposed center:

Value

Meaning

FILL_ROT

[0x0000] Rotate the image inside the arc pattern.

FILL_WOUTROT

[0x0010] Fill the exposed center as you would any other exposed area. This is determined by setting the FILL_CLR, FILL_RPT or FILL_NOCHG flags. This flag is ignored if the nValue is negative.

The following are the flags that indicate how the bitmap is bent:

Value

Meaning

BND_NORM

[0x0000] Stretch the image along the vertical and horizontal planes.

BND_HORZ

[0x0100] Stretch the image along the horizontal plane.

BND_VERT

[0x0200] Stretch the image along the vertical plane.

uDlgFlags

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

Value

Meaning

DLG_BENDING_AUTOPROCESS

[0x00000001] process the image on OK. The pBitmap member of this structure should contain a valid bitmap.

DLG_BENDING_SHOW_CONTEXTHELP

[0x00000002] dialog should contain a context sensitive help icon.

DLG_BENDING_SHOW_PREVIEW

[0x00000004] show a preview of the image in the dialog. The pBitmap member of this structure should contain a valid bitmap.

DLG_BENDING_SHOW_TOOL_ZOOMLEVEL

[0x00000008] show the "Zoom to fit" and "Zoom Normal" toolbar buttons. The DLG_BENDING_SHOW_PREVIEW flag must be set in order to show these buttons.

DLG_BENDING_SHOW_APPLY

[0x00000080] Show the Apply button in the dialog. The dialog will not apply any effect unless the user presses the Apply 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.