DrawThemeText function

Draws text using the color and font defined by the visual style.

Syntax

THEMEAPI DrawThemeText(
  HTHEME  hTheme,
  HDC     hdc,
  int     iPartId,
  int     iStateId,
  LPCWSTR pszText,
  int     cchText,
  DWORD   dwTextFlags,
  DWORD   dwTextFlags2,
  LPCRECT pRect
);

Parameters

hTheme

Type: HTHEME

Handle to a window's theme data. Use OpenThemeData to create an HTHEME.

hdc

Type: HDC

HDC to use for drawing.

iPartId

Type: int

The control part that has the desired text appearance. See Parts and States. If this value is 0, the text is drawn in the default font, or a font selected into the device context.

iStateId

Type: int

The control state that has the desired text appearance. See Parts and States.

pszText

Type: LPCWSTR

Pointer to a string that contains the text to draw.

cchText

Type: int

Value of type int that contains the number of characters to draw. If the parameter is set to -1, all the characters in the string are drawn.

dwTextFlags

Type: DWORD

DWORD that contains one or more values that specify the string's formatting. See Format Values for possible parameter values.

Note  DrawThemeText does not support DT_CALCRECT. However, DrawThemeTextEx does support DT_CALCRECT.
 

dwTextFlags2

Type: DWORD

Not used. Set to zero.

pRect

Type: LPCRECT

Pointer to a RECT structure that contains the rectangle, in logical coordinates, in which the text is to be drawn. It is recommended to use pExtentRect from GetThemeTextExtent to retrieve the correct coordinates.

Return Value

Type: HRESULT

If this function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

The function always uses the themed font for the specified part and state if one is defined. Otherwise it uses the font currently selected into the device context. To find out if a themed font is defined, you can call GetThemeFont or GetThemePropertyOrigin with TMT_FONT as the property identifier.

Examples

DrawThemeText uses parameters similar to the Win32 DrawText function, but with a few differences. One of the most notable is support for wide-character strings. Therefore, non-wide strings must be converted to wide strings, as in the following example.

Security Warning:  Using MultiByteToWideChar incorrectly can compromise the security of your application. Ensure that when creating wide-character buffers they are large enough to accommodate the size of the string in wide characters, not in bytes.

INT cchText = GetWindowTextLength(_hwnd);
if (cchText > 0)
{
    TCHAR *pszText = new TCHAR[cchText+1];
    if (pszText)
    {
        if (GetWindowText(_hwnd, pszText, cchText+1))
        {
            int widelen = MultiByteToWideChar(CP_ACP, 0, reinterpret_cast<LPCSTR>(pszText), 
                    cchText+1, NULL, 0);
            WCHAR *pszWideText = new WCHAR[widelen+1];
            MultiByteToWideChar(CP_ACP, 0, reinterpret_cast<LPCSTR>(pszText), cchText, 
                    pszWideText, widelen);

            SetBkMode(hdcPaint, TRANSPARENT);
            DrawThemeText(_hTheme,
                    hdcPaint,
                    BP_PUSHBUTTON,
                    _iStateId,
                    pszWideText,
                    cchText,
                    DT_CENTER | DT_VCENTER | DT_SINGLELINE,
                    NULL,
                    &rcContent);

            delete [] pszWideText;
        }

        delete [] pszText;
    }
}

Requirements

   
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header uxtheme.h
Library UxTheme.lib
DLL UxTheme.dll

See Also

Property Identifiers