ExtTextOut

The ExtTextOut function draws a character string by using the currently selected font, background color, and text color. An optional rectangle may be provided, to be used for clipping, opaquing, or both.

BOOL ExtTextOut(
  HDC hdc,          // handle to device context
  int X,            // x-coordinate of reference point
  int Y,            // y-coordinate of reference point
  UINT fuOptions,   // text-output options
  CONST RECT *lprc, // optional clipping and/or opaquing rectangle
  LPCTSTR lpString, // points to string
  UINT cbCount,     // number of characters in string
  CONST INT *lpDx   // pointer to array of intercharacter spacing 
                    // values
);
 

Parameters

hdc

Handle to the device context.

X

Specifies the logical x-coordinate of the reference point used to position the string.

Y

Specifies the logical y-coordinate of the reference point used to position the string.

fuOptions

Specifies how to use the application-defined rectangle. This parameter can be a combination of the following values:

Value	Meaning
ETO_CLIPPED	The text will be clipped to the rectangle.
ETO_GLYPH_INDEX	The lpString array refers to an array returned from GetCharacterPlacement and should be parsed directly by GDI as no further language-specific processing is required. Glyph indexing only applies to TrueType fonts, but the flag can be used for bitmap and vector fonts to indicate no further language processing is necessary and GDI should process the string directly. Note that all glyph indices are 16-bit values even though the string is assumed to be an array of 8-bit values for raster fonts.
ETO_OPAQUE	The current background color should be used to fill the rectangle.
ETO_RTLREADING	Middle-Eastern Windows: If this value is specified and a Hebrew or Arabic font is selected into the device context, the string is output using right-to-left reading order. If this value is not specified, the string is output in left- to-right order. The same effect can be achieved by setting the TA_RTLREADING value in SetTextAlign. This value is preserved for backward compatability.

The ETO_GLYPH_INDEX and ETO_RTLREADING values cannot be used together. Because ETO_GLYPH_INDEX implies that all language processing has been completed, the function ignores the ETO_RTLREADING flag if also specified.

lprc

Pointer to an optional RECT structure that specifies the dimensions of a rectangle that is used for clipping, opaquing, or both.

lpString

Pointer to the character string to be drawn. The string does not need to be zero-terminated, since cbCount specifies the length of the string.

cbCount

Specifies the number of characters in the string.

lpDx

Pointer to an optional array of values that indicate the distance between origins of adjacent character cells. For example, lpDx[i] logical units separate the origins of character cell i and character cell i + 1.

Return Values

If the string is drawn, the return value is nonzero.

If the function fails, the return value is zero.

Windows NT: To get extended error information, call GetLastError.

Remarks

The current text-alignment settings for the specified device context determine how the reference point is used to position the text. The text-alignment settings are retrieved by calling the GetTextAlign function. The text-alignment settings are altered by calling the SetTextAlign function.

If the lpDx parameter is NULL, the ExtTextOut function uses the default spacing between characters. The character-cell origins and the contents of the array pointed to by the lpDx parameter are given in logical units. A character-cell origin is defined as the upper-left corner of the character cell.

By default, the current position is not used or updated by this function. However, an application can call the SetTextAlign function with the fMode parameter set to TA_UPDATECP to permit the system to use and update the current position each time the application calls ExtTextOut for a specified device context. When this flag is set, the system ignores the X and Y parameters on subsequent ExtTextOut calls.

Windows CE: Windows CE supports only the following flags for the fuOptions parameter.

ETO_CLIPPED

ETO_OPAQUE

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Requires version 1.0 or later.
  Header: Declared in wingdi.h.
  Import Library: Use gdi32.lib.
  Unicode: Implemented as Unicode and ANSI versions on Windows and Windows NT.

See Also

Fonts and Text Overview, Font and Text Functions, GetTextAlign, RECT, SetBkColor, SelectObject, SetTextAlign, SetTextColor