Desktop Functions: Smart Device Functions:
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GetTextExtentPoint (gdi32)
C# Signature:
[DllImport("gdi32.dll")] User-Defined Types:None. (None needed) Notes (From MSDN):The GetTextExtentPoint function uses the currently selected font to compute the dimensions of the string. GetTextExtentPoint computes the width and height, in logical units, without considering any clipping. Because some devices kern characters, the sum of the extents of the characters in a string does not always equal to the extent of the string. The GetTextExtentPoint function is identical to the GetTextExtentPoint32 function. Notes (From Author/Editor Gabriel Sharp)If you use TextOut, you will need to save the screen to a back buffer or else this output will disappear. You can either use a backbuffer directly or through the Graphics.CopyFromScreen method. Advanced users might also try the BitBlt Api call, which can sometimes, under certain conditions, be faster. Tips & Tricks:This API is useful for TextOut preparation or post comparison. These API's are most useful when working with fonts other than (but not restricted to) True Type, Open Type, and PostScript fonts. The most common being raster (pixel) fonts which are not supported by the .NET framework. TextOut and it's helpers tend to be a bit faster because they are unmanaged and work well with .NET's existing [Graphics.GetHdc()] method. Any graphics / bitmap pair you create will already have a default font, and you can start using TextOut and the above function right away without having to pre-init all the stuff that goes with it (Fonts, Brushes, etc). Good luck! Sample Code:
// Paste this at the beginning of your file if not present: using System.Drawing; using System.Runtime.InteropServices;
// Paste This Inside a New Form's Code After InitializeComponent() {} Alternative Managed API:Graphics.DrawString Graphics.MeasureString Graphics. MeasureCharacterRanges Original Document Stub:
|| || Requirements || OS Versions: Windows CE 2.0 and later. || Header: Windows.h. || Link Library: Coredll.lib. || This function computes the width and height of the specified string of text. || || BOOL GetTextExtentPoint32( || HDC hdc, || LPCTSTR lpString, || int cbString, || LPSIZE lpSize || ); Parameters hdc in Handle to the device context (DC). lpString in Long pointer to the string of text. The string does not need to be zero-terminated because cbString specifies the length of the string. cbString in Integer that specifies the number of characters in the string. lpSize out Long pointer to a SIZE structure that receives the dimensions of the string. Return Values Nonzero indicates success. Zero indicates failure. To get extended error information, call GetLastError. Remarks The GetTextExtentPoint32 function uses the currently selected font to compute the dimensions of the string. GetTextExtentPoint32 computes the width and height, in logical units, without considering any clipping. Because some devices kern characters, the sum of the extents of the characters in a string does not always equal to the extent of the string. The GetTextExtentPoint32 function is identical to the GetTextExtentPoint function. Requirements OS Versions: Windows CE 2.0 and later. Please edit this page!Do you have...
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