Font.FromLogFon t producing strange results

[Justin Van Patten]

Hello,

I am having trouble converting a LOGFONT structure to a System.Drawing. Font
object.

I'm calling SystemParameter sInfo to get the LOGFONT lfntSMCaptionFo nt from a
NONCLIENTMETRIC S structure. I seem to be doing this correctly, but when I
try to create a System.Drawing. Font object with the Font.FromLogFon t, the
new Font object has a different Name than the LOGFONT.

Here are the results of my test program (WinXP):

LOGFONT Name: Tahoma
Creating a System.Drawing. Font object from the LOGFONT...
Font Name: Arial

The FaceName of the LOGFONT is "Tahoma" (which is correct), but after using
the Font.FromLogFon t method, the Font object's Name property yields "Arial"

Does anyone have any ideas?

Thanks for any insight, below is the C# source of my test program.

Regards,
-Justin Van Patten
// Test Program Source
using System;
using System.Runtime. InteropServices ;
using System.Drawing;

class Test
{

[StructLayout(La youtKind.Sequen tial)]
public struct LOGFONT
{
public int lfHeight;
public int lfWidth;
public int lfEscapement;
public int lfOrientation;
public int lfWeight;
public byte lfItalic;
public byte lfUnderline;
public byte lfStrikeOut;
public byte lfCharSet;
public byte lfOutPrecision;
public byte lfClipPrecision ;
public byte lfQuality;
public byte lfPitchAndFamil y;
[MarshalAs(Unman agedType.ByValT Str, SizeConst=32)]
public string lfFaceName;
}

[StructLayout(La youtKind.Sequen tial)]
public struct NONCLIENTMETRIC S
{
public int cbSize;
public int iBorderWidth;
public int iScrollWidth;
public int iScrollHeight;
public int iCaptionWidth;
public int iCaptionHeight;
public LOGFONT lfntCaptionFont ;
public int iSMCaptionWidth ;
public int iSMCaptionHeigh t;
public LOGFONT lfntSMCaptionFo nt;
public int iMenuWidth;
public int iMenuHeight;
public LOGFONT lfntMenuFont;
public LOGFONT lfntStatusFont;
public LOGFONT lfntMessageFont ;
}

[DllImport("User 32.dll")]
public static extern bool SystemParameter sInfo(
int Action, int uiParam,
ref NONCLIENTMETRIC S pvParam, int WinIni);

static void Main()
{

const int SPI_GETNONCLIEN TMETRICS = 41;

try
{

NONCLIENTMETRIC S ncm = new NONCLIENTMETRIC S();
ncm.cbSize = Marshal.SizeOf( ncm);
bool b = SystemParameter sInfo(SPI_GETNO NCLIENTMETRICS, ncm.cbSize, ref ncm,
0);

if (b)
{

// Output The LOGFONT's FaceName
Console.WriteLi ne("LOGFONT Name: \t{0}", ncm.lfntSMCapti onFont.lfFaceNa me);

Console.WriteLi ne("Creating a System.Drawing. Font object from the
LOGFONT...");

// Try to create a System.Drawing. Font object from the LOGFONT
Font SMCaptionFont = Font.FromLogFon t(ncm.lfntSMCap tionFont);

// Output the name
Console.WriteLi ne("Font Name: \t{0}", SMCaptionFont.N ame);

}
else
{
Console.WriteLi ne("Failed");
}

}
catch (Exception ex)
{
Console.WriteLi ne(ex.ToString( ));
}
}
}

[Mattias Sjögren]

Justin,

Does anyone have any ideas?

Add CharSet=CharSet .Auto to the StructLayout and DllImport attributes.

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/
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