@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: The GetCharacterPlacement API !!!!C# Signature: [DllImport("gdi32.dll", EntryPoint="GetCharacterPlacementW")] static extern uint GetCharacterPlacementW(IntPtr hdc, [MarshalAs(UnmanagedType.LPWStr)] string lpString, int nCount, int nMaxExtent, ref GCP_RESULTS lpResults, uint dwFlags); !!!!User-Defined Types: [StructLayout(LayoutKind.Sequential)] public struct GCP_RESULTS { public int StructSize; [MarshalAs(UnmanagedType.LPTStr)] public string OutString; public IntPtr Order; public IntPtr Dx; public IntPtr CaretPos; public IntPtr Class; public IntPtr Glyphs; public int GlyphCount; public int MaxFit; } [Flags] public enum GCPFlags : uint { GCP_DBCS = 0x0001, GCP_REORDER = 0x0002, GCP_USEKERNING = 0x0008, GCP_GLYPHSHAPE = 0x0010, GCP_LIGATE = 0x0020, GCP_DIACRITIC = 0x0100, GCP_KASHIDA = 0x0400, GCP_ERROR = 0x8000, GCP_JUSTIFY = 0x00010000, GCP_CLASSIN = 0x00080000, GCP_MAXEXTENT = 0x00100000, GCP_JUSTIFYIN = 0x00200000, GCP_DISPLAYZWG = 0x00400000, GCP_SYMSWAPOFF = 0x00800000, GCP_NUMERICOVERRIDE = 0x01000000, GCP_NEUTRALOVERRIDE = 0x02000000, GCP_NUMERICSLATIN = 0x04000000, GCP_NUMERICSLOCAL = 0x08000000, } !!!!Notes: None. !!!!Tips & Tricks: Please add some! !!!!Sample Code: public int GetCaretPostion(string str, int index) { IntPtr OldFont = SelectObject(this.DC, this.Font); int len = str.Length; int[] order = new int[len]; int[] dx = new int[len]; int[] caret = new int[len]; byte[] clss = new byte[len]; short[] glys = new short[len]; GCHandle ordHnd = GCHandle.Alloc(order, GCHandleType.Pinned); GCHandle dxHnd = GCHandle.Alloc(dx, GCHandleType.Pinned); GCHandle carHnd = GCHandle.Alloc(caret, GCHandleType.Pinned); GCHandle clsHnd = GCHandle.Alloc(clss, GCHandleType.Pinned); GCHandle glyHnd = GCHandle.Alloc(glys, GCHandleType.Pinned); try { GCP_RESULTS rs = new GCP_RESULTS(); rs.StructSize = Marshal.SizeOf(typeof(GCP_RESULTS)); rs.OutString = new String('\0', len + 2); rs.Order = ordHnd.AddrOfPinnedObject(); rs.Dx = dxHnd.AddrOfPinnedObject(); rs.CaretPos = carHnd.AddrOfPinnedObject(); rs.Class = clsHnd.AddrOfPinnedObject(); rs.Glyphs = glyHnd.AddrOfPinnedObject(); rs.GlyphCount = len; rs.MaxFit = 0; GCPFlags flg = GCPFlags.GCP_GLYPHSHAPE; uint r = GetCharacterPlacement(this.DC, str, len, 0, ref rs, (uint)flg); if (r == 0) throw new Exception(string.Format("GeCharacterPlacement Error {0}", Marshal.GetLastWin32Error())); } finally { ordHnd.Free(); dxHnd.Free(); carHnd.Free(); clsHnd.Free(); glyHnd.Free(); } SelectObject(this.DC, OldFont); return caret[index]; } !!!!Alternative Managed API: Do you know one? Please contribute it! Documentation: GetCharacterPlacement@msdn on MSDN
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