 |
 |
 |
 |
|
 |
|
 |
|
||||||||
| ||||||||
|
| |||||||
| Freebarcodes.com: |
|
NarrowBarWidth PropertyReturns or sets a value for the width of the bars in all linear bar code symbols produced by a TAL Bar Code control. Syntax object.NarrowBarWidth [= number] The NarrowBarWidth property syntax has these parts:
Remarks The NarrowBarWidth (expressed in integer units of .mils) specifies the width of the narrowest bar in the bar code. All other bar and space width dimensions are based on this width (referred to as the nominal X dimension). This parameter as well as the number of characters to encode, effectively determines the total width of a bar code symbol. The best choice for this dimension depends partly on the resolution of your bar code reader and also on the resolution of the printer being used to produce the bar code. As a general rule the Narrow Bar Width should fall in a range between 10 to 30 mils and should never be less than 7.5 mils. 13 mils is the most commonly recommended value for most bar code readers. For UPC and EAN bar codes, the smallest allowable Narrow bar width is 10.4 mils. The allowable range of values for NarrowBarWidth property in the TAL Bar Code control is 0 to 100. If you pass the value zero, the default value of 13 mils will be used. See Also The NarrowToWideRatio Property Bar Code Dimensions NarrowToWideRatio PropertyReturns or sets a value for the width of the bars in all linear bar code symbols produced by a TAL Bar Code control. Syntax object.NarrowToWideRatio [= number] The NarrowToWideRatio property syntax has these parts:
Remarks The symbologies Code 39, Interleaved 2 of 5 and CodaBar consist of bars and spaces with only two element widths, Narrow and Wide Elements where the width of the wide elements is a fixed multiple of the width of the narrow elements. The specifications for these symbologies allow you to choose a Narrow to Wide Element Ratio ranging from 2.0 to 3.0. This property is valid only for Code 39, Interleaved 2 of 5 and CodaBar and all other symbologies will ignore it. The rules for these symbologies specify that when the Narrow Bar Width is less than 20 mils, the Narrow To Wide element ratio must be 2.2 or greater. The default NarrowToWideRatio of 2.5 should be acceptable for most applications. Note: Higher quality readers may be able to read bar codes with a narrow to wide ratio less than 2.2 no matter what the narrow element width is. Lower quality readers often need a ratio of at least 2.5. Because of the variability between readers, you should always test different ratio values and select the value that produces bar codes with the best "first pass" read rate. See Also The NarrowBarWidth Property Bar Code Dimensions PDFAspectRatio PropertyReturns or sets a value for the overall height to width ratio of all PDF417 bar code symbols produced by a TAL Bar Code control. Syntax object.PDFAspectRatio [= number] The PDFAspectRatio property syntax has these parts:
Remarks The PDFAspectRatio determines the overall shape of the PDF417 symbol and is defined as the overall height to width ratio. Higher values for the Aspect Ratio (greater than 1) produce tall, thin PDF417 bar codes and small values (greater than zero and less than 1) produce short, wide bar codes. A value of 1 should produce approximately square bar codes. See Also PDF417 Symbology Description PDFMaxCols PropertyReturns or sets a value for the maximum number of codeword columns to allow in all PDF417 bar code symbols produced by a TAL Bar Code control. Syntax object.PDFMaxCols [= number] The PDFMaxCols property syntax has these parts:
Remarks The PDFMaxCols and the PDFMaxRows properties allow you to set an upper limit on the width or the height of a PDF417 bar code symbol by limiting the maximum number of codeword rows or columns in the symbol. The PDFMaxCols property specifies the maximum number of codeword columns in a PDF symbol. The allowable range is 1 to 30. If you specify a value outside the allowable range then the default value of 30 will be used. See Also The PDFMaxRows Property PDF417 Symbology Description PDFMaxRows PropertyReturns or sets a value for the maximum number of codeword rows to allow in all PDF417 bar code symbols produced by a TAL Bar Code control. Syntax object.PDFMaxRows [= number] The PDFMaxRows property syntax has these parts:
Remarks The PDFMaxCols and the PDFMaxRows properties allow you to set an upper limit on the width or the height of a PDF417 bar code symbol by limiting the maximum number of codeword rows or columns in the symbol. The PDFMaxRows property specifies the maximum number of codeword rows in a PDF symbol. The allowable range is 3 to 90. If you specify a value outside the allowable range then the default value of 90 will be used. See Also The PDFMaxCols Property PDF417 Symbology Description PDFModuleHeight PropertyReturns or sets a value for the height of the smallest modules in all PDF417 bar code symbols produced by a TAL Bar Code control. Syntax object.PDFModuleHeight [= number] The PDFModuleHeight property syntax has these parts:
Remarks The recommended value for the Module Height is approximately three times the value for the PDFModuleWidth property however the symbol specifications allow for module heights as small as 10 mils (.25mm). This translates to 3 printer dots on a 300 DPI laser printer. See Also The PDFModuleWidth Property The PDFTruncatedSymbol Property PDF417 Symbology Description PDFModuleWidth PropertyReturns or sets a value for the width of the smallest modules in all PDF417 bar code symbols produced by a TAL Bar Code control. Syntax object.PDFModuleWidth [= number] The PDFModuleWidth property syntax has these parts:
Remarks The specification for PDF417 recommends that the PDFModuleWidth should fall in a range between 10 and 30 mils (.25mm to .76mm). The smallest allowable module width defined in the symbology specification is 6.56 mils (.17mm). This translates to 2 printer dots when printing to a 300 DPI laser printer. The best way to determine the ideal PDFModuleWidth for your application is to actually print out a sample bar code using several different values and try reading each one with your scanning equipment. You should choose the value that produces bar codes with the best read rate. See Also The PDFModuleHeight Property The PDFTruncatedSymbol Property PDF417 Symbology Description PDFPctOverhead PropertyReturns or sets a value for the percentage of error correction overhead to use in all PDF417 bar code symbols produced by a TAL Bar Code control. Syntax object.PDFPctOverhead [= number] The PDFPctOverhead property syntax has these parts:
Remarks The PDFPctOverhead property is valid only when the PDFSecurityLevel property is set to 9 (automatic). If you enter zero for this property, the default value of 10% will be used. See Also The PDFSecurityLevel Property The PDFTruncatedSymbol Property PDF417 Symbology Description PDFSecurityLevel PropertyReturns or sets a value for security level or Error Checking and Correction level (ECC) to use in all PDF417 bar code symbols produced by a TAL Bar Code control. Syntax object.PDFSecurityLevel [= number] The PDFSecurityLevel property syntax has these parts:
Remarks The PDFSecurityLevel property allows you to select a PDF417 error correction level from 0 to 8 (or 9 for automatic). Each higher security level up to 8 adds additional overhead to a PDF417 symbol thereby consuming more symbol real estate. You can have the TAL Bar Code control automatically select an error correction level based on a percentage of total symbol area that you want to devote to error correction. If you select the value 9 for the PDFSecurityLevel property and also pass a percentage value (from 0 to 99%) in the PDFPctOverhead property, the control will automatically choose a value that will limit the amount of error correction overhead to the given percentage of symbol area. This mechanism is designed so that you do not waste space on redundant error correction. See Also The PDFPctOverhead Property The PDFTruncatedSymbol Property PDF417 Symbology Description PDFTruncatedSymbol PropertyReturns or sets a value that determines whether to generate the truncated version of all PDF417 bar codes produced by the TAL Bar Code control. Syntax object.PDFTruncatedSymbol [= boolean] The PDFTruncatedSymbol property syntax has these parts:
See Also The PDFSecurityLevel Property The PDFPctOverhead Property PDF417 Symbology Description QuietZones PropertyReturns or sets a value that determines whether to include quiet zones at either end of all linear bar code symbols produced by the TAL Bar Code control. Syntax object.QuietZones [= boolean] The QuietZones property syntax has these parts:
Remarks Quiet Zones are small areas of blank space at either end of a bar code image. This space helps to insure that a bar code reader will be able to correctly determine the true beginning and end of a bar code symbol. The width of the quiet zones will be 10 times the NarrowBarWidth value for all 1 dimensional symbols and 2 times the PDFModuleWidth value for PDF417 bar codes. Most bar code symbology specifications require quiet zones therefore it is highly recommended that you enable this option. Note: UPC, EAN and BookLand bar codes automatically include quiet zones in the symbol. Selecting this option causes the width of the quiet zones in these symbols to be twice the normal width. RasterImageResolution PropertyReturns or sets a value that determines the dot resolution (in pixels per inch) to use when saving a bar code to a disk file using any of the raster graphic file formats (GIF, JPEG (JPG), PNG, TIF, TGA and BMP). Syntax object.RasterImageResolution [= value] The RasterImageResolution property syntax has these parts:
Remarks The RasterImageResolution property dramatically affects the quality and size of the images that are produced when you save your bar codes to a disk file. Increasing the value higher than the resolution of the printer that you will be using will provide no additional increase in the quality of the printed output and would only serve to slow down the execution speed of the file saving operation as well as increase the size of your graphic files. On the other hand, if you set this value too low, then the resolution of the saved image will not be high enough to render readable bar codes. The ideal value for this property is the resolution of your printer or an integer divisor of your printer resolution. For example, if you have a 600 DPI printer then setting the RasterImageResolution property to either 300 or 600 would produce extremely high quality bar codes. If you set the RasterImageResolution property to a value that is too low then there will not be enough pixels in the image to render the bars and spaces in the bar code accurately and you will end up with unreadable bar codes. The default value of 300 is a good overall choice that will produce sufficiently high resolution images that save quickly and produce reasonable file sizes. Rotation PropertyReturns or sets a value indicating how much to rotate a bar code symbol produced by the TAL Bar Code control. Syntax object.Rotation [= value] The Rotation property syntax has these parts:
Settings The settings for value are:
ShowCheckDigit PropertyReturns or sets a value that determines whether to include an optional check digit with all bar codes produced by the TAL Bar Code control that produce check digits. Syntax object.ShowCheckDigit [= boolean] The ShowCheckDigit property syntax has these parts:
Remarks Normally any optional check digits are not included in the human readable portion of a bar code symbol however there are some applications where you may want to display the check digit. This option is only valid for symbologies that support an optional check digit. Note: The optional check digit for EAN/UCC 128 will be displayed with the human readable text regardless of whether this option is selected or not. ShowHRText PropertyReturns or sets a value that determines whether to print the human readable text version of a bar code message with all linear bar codes produced by the TAL Bar Code control. Syntax object.ShowHRText [= boolean] The ShowHRText property syntax has these parts:
See Also The Comment Property The Message Property Symbology PropertyReturns or sets a value indicating the type of bar code symbol (symbology) to be generated by a TAL Bar Code control object. Syntax object.Symbology [= value] The Symbology property syntax has these parts:
Settings The settings for value are:
See Also Bar Code Symbology Descriptions and Rules TextOnTop PropertyReturns or sets a value that determines whether to print the human readable text above all bar codes produced by the TAL Bar Code control. Syntax object.TextOnTop [= boolean] The TextOnTop property syntax has these parts:
Remarks Normally the human readable message text is placed below the bar code symbol for all linear bar code symbologies. The two dimensional bar code symbologies (PDF417, Data Matrix, Aztec Code and MaxiCode) do not support the display of the human readable message with the bar code symbol. See Also The ShowHRText Property The CommentOnTop Property UccEan128OptionalCheckDigit PropertyReturns or sets a value that determines whether to include an optional check digit with all UCC/EAN 128 bar codes produced by the TAL Bar Code control. Syntax object.UccEan128OptionalCheckDigit [= boolean] The UccEan128OptionalCheckDigit property syntax has these parts:
Remarks If the UccEan128OptionalCheckDigit property is set to True, a check digit will be calculated using the modulo 10 sum of the values of all characters in the UCC/EAN 128 bar code message. The check digit is then appended to the original message before the bar code is produced. Note: The bar code message must consist of all numeric characters if the UccEan128OptionalCheckDigit property is set to True. an error event will be generated if the bar code message contains non-numeric characters. See Also EAN/UCC 128 Bar Code Symbology Description |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||