cbSize

Size of this structure, in bytes. The application must fill this member before sending any messages that use the address of this structure as a parameter.

fMask

Flags that indicate which members of this structure are valid or must be filled. It can be a combination of the following values.

Value	Description
RBBIM_BACKGROUND	The hbmBackmember is valid or must be filled.
RBBIM_CHILD	The hwndChildmember is valid or must be filled.
RBBIM_CHILDSIZE	The cxMinChildand cyMinChildmembers are valid or must be filled.
RBBIM_COLORS	The clrForeand clrBackmembers are valid or must be filled.
RBBIM_IDEALSIZE	The cxIdealmember is valid or must be filled.
RBBIM_ID	The wIDmember is valid or must be filled.
RBBIM_IMAGE	The iImagemember is valid or must be filled.
RBBIM_LPARAM	The lParammember is valid or must be filled.
RBBIM_SIZE	The cxmember is valid or must be filled.
RBBIM_STYLE	The fStylemember is valid or must be filled.
RBBIM_TEXT	The lpTextmember is valid or must be filled.

fStyle

Flags that specify the band style. It can be a combination of the following values.

Value	Description
RBBS_BREAK	The band is on a new line.
RBBS_CHILDEDGE	The band has an edge at the top and bottom of the child window.
RBBS_FIXEDBMP	The background bitmap does not move when the band is resized.
RBBS_FIXEDSIZE	The band cannot be sized. With this style, the sizing grip is not displayed on the band.
RBBS_GRIPPERALWAYS	The band will always have sizing grip, even if it is the only band in the rebar.
RBBS_HIDDEN	The band will not be visible.
RBBS_NOVERT	The band is not displayed when the rebar control uses the CCS_VERT style.
RBBS_VARIABLEHEIGHT	The band can be resized by the rebar control. cyIntegraland cyMaxChildaffect how the rebar will resize the band.

clrForeand clrBack

Band foreground and background colors. If hbmBackspecifies a background bitmap, these members are ignored.

lpText

Long pointer to a buffer that contains the display text for the band. If band information is being requested from the control and RBBIM_TEXT is specified in fMask, this member must be initialized to the address of the buffer that will receive the text.

cch

Size of the buffer at lpText, in bytes. If information is not being requested from the control, this member is ignored.

iImage

Zero-based index of any image that should be displayed in the band, if any. The image list is set using the RB_SETBARINFOmessage.

hwndChild

Handle to the child window contained in the band, if any.

cxMinChild

Minimum length of the child window, in pixels. The band cannot be sized smaller than this value.

cyMinChild

Minimum thickness of the child window, in pixels. The band cannot be sized smaller than this value.

cx

Length of the band, in pixels.

hbmBack

Handle to a bitmap that is used as the background for this band.

wID

Unsigned integer that the control uses to identify this band for Custom Draw messages. This value may be used for additional purposes in the future.

cyChild

Initial height of the band, in pixels. This member is ignored unless the RBBS_VARIABLEHEIGHT style is specified.

cyMaxChild

Maximum height of the band, in pixels. This member is ignored unless the RBBS_VARIABLEHEIGHT style is specified.

cyIntegral

Specifies the step value by which the band can grow or shrink, in pixels. If the band is resized, it will be resized in steps specified by this value. This member is ignored unless the RBBS_VARIABLEHEIGHT style is specified.

cxIdeal

Specifies the ideal width of the band, in pixels. If the band is maximized to the ideal width (see RB_MAXIMIZEBAND), the rebar control will attempt to make the band this width.

lParam

Specifies a 32-bit application-defined value.

The cxMinChild, cyMinChild, and cxmembers provide information on dimensions relative to the orientation of the control. That is, for a horizontal rebar control, cxMinChildand cxare horizontal measurements and cyMinChildis a vertical measurement. However, if the control uses the CCS_VERT style, cxMinChildand cxare vertical measurements and cyMinChildis a horizontal measurement.