DrawState - Win32 Programmer's Reference (win32.hlp)

Win32 Programmer's Reference

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Windows NT
Yes
Win95
Yes
Win32s
No
Import Library
user32.lib
Header File
winuser.h
Unicode
No
Platform Notes
None

DrawState

[Now Supported on Windows NT]

The DrawState function displays an image and applies a visual effect to indicate a state, such as a disabled or default state.

BOOL WINAPI DrawState(

HDC hdc,	// handle to device context
HBRUSH hbr,	// handle to brush
DRAWSTATEPROC lpOutputFunc,	// pointer to callback function
LPARAM lData,	// image information
WPARAM wData,	// more image information
int x,	// horizontal location of image
int y,	// vertical location of image
int cx,	// width of image
int cy,	// height of image
UINT fuFlags	// image type and state
);

Parameters
hdc

Identifies the device context to draw in.

hbr

Identifies the brush used to draw the image, if the state specified by the fuFlags parameter is DSS_MONO. This parameter is ignored for other states.

lpOutputFunc

Points to an application-defined callback function used to render the image. This parameter is required if the image type in fuFlags is DST_COMPLEX. It is optional and can be NULL if the image type is DST_TEXT. For all other image types, this parameter is ignored. For more information about the callback function, see the DrawStateProc function.

lData

Specifies information about the image. The meaning of this parameter depends on the image type.

wData

Specifies information about the image. The meaning of this parameter depends on the image type. It is, however, zero extended for use with the DrawStateProc function.

Specifies the horizontal location at which to draw the image.

Specifies the vertical location at which to draw the image.

Specifies the width of the image, in device units. This parameter is required if the image type is DST_COMPLEX. Otherwise, it can be zero to calculate the width of the image.

Specifies the height of the image, in device units. This parameter is required if the image type is DST_COMPLEX. Otherwise, it can be zero to calculate the height of the image.

fuFlags

Specifies the image type and state. The type can be one of these values:

Value (type)	Meaning
DST_BITMAP	The image is a bitmap. The low-order word of the lData parameter is the bitmap handle.
DST_COMPLEX	The image is application defined. To render the image, DrawState calls the callback function specified by the lpOutputFunc parameter.
DST_ICON	The image is an icon. The low-order word of lData is the icon handle.
DST_PREFIXTEXT	The image is text that may contain an accelerator mnemonic. DrawState interprets the ampersand (&) prefix character as a directive to underscore the character that follows. The lData parameter specifies the address of the string, and the wData parameter specifies the length. If wData is zero, the string must be null-terminated.
DST_TEXT	The image is text. The lData parameter specifies the address of the string, and the wData parameter specifies the length. If wData is zero, the string must be null-terminated.

The state can be one of these values:

Value (state)	Meaning
DSS_NORMAL	Draws the image without any modification.
DSS_UNION	Dithers the image.
DSS_DISABLED	Embosses the image.
DSS_MONO	Draws the image using the brush specified by the hbr parameter.

For all states except DSS_NORMAL, the image is converted to monochrome before the visual effect is applied.

Return Values
If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero.