Determining font family/size from font handle

[Melba23]

Hi,

I am trying to get my head around fonts - not an easy task as I am rapidly finding out! At this moment I am attempting to identify the font used in a control - something which Au3 Window Info does not give me - perhaps for a very good reason!

I have found that I can get the handle to the font in a control by using the following:

$hWnd = ControlGetHandle($hGui, "", $hControl)
$hFont = _SendMessage($hWnd, $WM_GETFONT, 0, 0, 5)

This returns a nice array:

[0] = 185211881

[1] = 0x000508F4

[2] = 49

[3] = 0

[4] = 0

which is all very well, but does not let me identify the font in question. I have looked through MSDN and Googled furiously and there does not appear to be function to get the font family/size data from this handle, although I have found a number of quotes such as:

"HFONT, a handle to a Logical Font in memory. The data held by this handle can be retrieved into a LOGFONT structure"

So to my question: How can you get the LOGFONT from the handle in AutoIt?

From my studies, I believe the LOGFONT structure should read:

$tLOGFONT = DllStructCreate("long;long;long;long;long;byte;byte;byte;byte;byte;byte;byte;byte;char[32]")

derived from:

typedef struct tagLOGFONT {

LONG lfHeight;

LONG lfWidth;

LONG lfEscapement;

LONG lfOrientation;

LONG lfWeight;

BYTE lfItalic;

BYTE lfUnderline;

BYTE lfStrikeOut;

BYTE lfCharSet;

BYTE lfOutPrecision;

BYTE lfClipPrecision;

BYTE lfQuality;

BYTE lfPitchAndFamily;

TCHAR lfFaceName[LF_FACESIZE];

} LOGFONT, *PLOGFONT;

But how to populate it, given the handle?

Grateful for any pointers (pun firmly intended!),

M23

[martin]

Hi,

I am trying to get my head around fonts - not an easy task as I am rapidly finding out! At this moment I am attempting to identify the font used in a control - something which Au3 Window Info does not give me - perhaps for a very good reason!

I have found that I can get the handle to the font in a control by using the following:

$hWnd = ControlGetHandle($hGui, "", $hControl)
$hFont = _SendMessage($hWnd, $WM_GETFONT, 0, 0, 5)

This returns a nice array:

[0] = 185211881

[1] = 0x000508F4

[2] = 49

[3] = 0

[4] = 0

which is all very well, but does not let me identify the font in question. I have looked through MSDN and Googled furiously and there does not appear to be function to get the font family/size data from this handle, although I have found a number of quotes such as:

"HFONT, a handle to a Logical Font in memory. The data held by this handle can be retrieved into a LOGFONT structure"

So to my question: How can you get the LOGFONT from the handle in AutoIt?

From my studies, I believe the LOGFONT structure should read:

$tLOGFONT = DllStructCreate("long;long;long;long;long;byte;byte;byte;byte;byte;byte;byte;byte;char[32]")

derived from:

typedef struct tagLOGFONT {

LONG lfHeight;

LONG lfWidth;

LONG lfEscapement;

LONG lfOrientation;

LONG lfWeight;

BYTE lfItalic;

BYTE lfUnderline;

BYTE lfStrikeOut;

BYTE lfCharSet;

BYTE lfOutPrecision;

BYTE lfClipPrecision;

BYTE lfQuality;

BYTE lfPitchAndFamily;

TCHAR lfFaceName[LF_FACESIZE];

} LOGFONT, *PLOGFONT;

But how to populate it, given the handle?

Grateful for any pointers (pun firmly intended!),

M23

I don't know the answer but my guess is that you need to create a logfont structure, get the lofgont handle using

$hLogFont = _SendMessage($hWnd, $WM_GETFONT, 0, 0)

then get the data into the structure using $hLogFont in _WinAPI_GetObject twice, first with the first parameter as 0 to get the number of bytes needed, then use that for the second parameter the second time. So it would be something like this

$hLogFont = _SendMessage($hWnd, $WM_GETFONT, 0, 0)
$structLF = DllStructCreate($tagLogFont)
$isize = _WinAPI_GetObject($hLogFont ,0,0)
$iWritten = _WinAPI_GetObject($hLogFont ,$isize,DllStructGetptr($structLF))

then the data should be in the struct for you to read.

I haven't tried it btw.

Edited December 19, 2008 by martin

[Melba23]

@martin,

Thanks, works a treat.

M23