@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: The GetTextMetrics API !!!!C# Signature: [DllImport("gdi32.dll", CharSet = CharSet.Auto)] static extern bool GetTextMetrics(IntPtr hdc, out TEXTMETRIC lptm); //CharSet.auto automatically selects between these functions based on the OS version: [DllImport("gdi32.dll", CharSet = CharSet.Unicode)] private static extern bool GetTextMetricsW(IntPtr hdc, out TEXTMETRICW lptm); [DllImport("gdi32.dll", CharSet = CharSet.Ansi)] private static extern bool GetTextMetricsA(IntPtr hdc, out TEXTMETRICA lptm); !!!!User-Defined Types: [TEXTMETRIC] !!!!Notes: It's very important to use the same charset on the TEXTMETRIC structure and the extern function. !!!!Tips & Tricks: Please add some! !!!!Sample Code: public static TEXTMETRIC GetTextMetrics(Graphics graphics, Font font) { IntPtr hDC = graphics.GetHdc(); TEXTMETRIC textMetric; IntPtr hFont = font.ToHfont(); try { IntPtr hFontPreviouse = SelectObject(hDC, hFont); bool result = GetTextMetrics(hDC, out textMetric); SelectObject(hDC, hFontPreviouse); } finally { DeleteObject(hFont); graphics.ReleaseHdc(hDC); } return textMetric; } [DllImport("Gdi32.dll", CharSet=CharSet.Auto)] static extern IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobj); [DllImport("Gdi32.dll", CharSet=CharSet.Auto)] static extern bool GetTextMetrics(IntPtr hdc, out TEXTMETRIC lptm); [DllImport("Gdi32.dll", CharSet=CharSet.Auto)] static extern bool DeleteObject(IntPtr hdc); [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] internal struct TEXTMETRIC { public int tmHeight; public int tmAscent; public int tmDescent; public int tmInternalLeading; public int tmExternalLeading; public int tmAveCharWidth; public int tmMaxCharWidth; public int tmWeight; public int tmOverhang; public int tmDigitizedAspectX; public int tmDigitizedAspectY; public char tmFirstChar; public char tmLastChar; public char tmDefaultChar; public char tmBreakChar; public byte tmItalic; public byte tmUnderlined; public byte tmStruckOut; public byte tmPitchAndFamily; public byte tmCharSet; } // C++/CLI [StructLayout(LayoutKind::Sequential, CharSet=CharSet::Unicode)] public ref struct TEXTMETRIC { int tmHeight; int tmAscent; int tmDescent; int tmInternalLeading; int tmExternalLeading; int tmAveCharWidth; int tmMaxCharWidth; int tmWeight; int tmOverhang; int tmDigitizedAspectX; int tmDigitizedAspectY; Char tmFirstChar; Char tmLastChar; Char tmDefaultChar; Char tmBreakChar; Byte tmItalic; Byte tmUnderlined; Byte tmStruckOut; Byte tmPitchAndFamily; Byte tmCharSet; }; [DllImport("Gdi32.dll", CharSet=CharSet::Unicode)] static bool GetTextMetrics(IntPtr hdc, [Out] TEXTMETRIC% lptm); TEXTMETRIC^ GetTextMetricsReal(Graphics^ g, Font^ font) { IntPtr hDC = g->GetHdc(); TEXTMETRIC^ textMetric = gcnew TEXTMETRIC; IntPtr hFont = font->ToHfont(); try { IntPtr hFontPrevious = Win32::SelectObject(hDC, hFont); bool result = Win32::GetTextMetrics(hDC, *textMetric); Win32::SelectObject(hDC, hFontPrevious); } finally { Win32::DeleteObject(hFont); g->ReleaseHdc(hDC); } return textMetric; } !!!!Alternative Managed API: Do you know one? Please contribute it! Documentation: GetTextMetrics@msdn on MSDN
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