BUILDING BLOCKS in Java

Encoder PDF-417 2d barcode in Java BUILDING BLOCKS
BUILDING BLOCKS
Create PDF 417 In Java
Using Barcode printer for Java Control to generate, create PDF 417 image in Java applications.
There are several additional typelibs that carry the VBoost name to make them easy to find in the Project/References dialog These typelibs also use types from the main type library to eliminate redefinition of common types These files include VBoost: Object Creation and Security (ObjCreateOlb), VBoost: Ole Type Definitions (OleTypesOlb), VBoost: Type Library Types and Interfaces (TlbTypesOlb), VBoost: API declares used for threading (ThreadAPlOlb), and VBoost: ROT Hook Types (ROTHookTypesOlb) VBoost itself does not require references to the additional libraries You'll need to initialize a VBoost variable before running the samples in this book This is easily done with the following steps: Use the Project/References dialog to add a reference to VBoost Object Types (60) and VBoost Object Implementation (60) Add the VBoostBas file from your local copy of the PowerVB\Code directory on the book's CD Call InitVBoost somewhere early in your code It is easiest to do this from Sub Main, but there is minimal penalty for calling InitVBoost more than once just to be sure You are now ready to pull any of the files from the PowerVB\Code directory and write your own code against the VBoost extensions
Encoding Barcode In Java
Using Barcode printer for Java Control to generate, create barcode image in Java applications.
ADVANCED VISUAL BASIC 6
Recognizing Barcode In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
2
Draw PDF 417 In Visual C#.NET
Using Barcode printer for Visual Studio .NET Control to generate, create PDF-417 2d barcode image in Visual Studio .NET applications.
Leveraging Arrays
PDF417 Creation In Visual Studio .NET
Using Barcode generator for ASP.NET Control to generate, create PDF-417 2d barcode image in ASP.NET applications.
Arrays are an indispensable tool for any serious programmer Arrays allow programs to make the quantum leap from acting on a single item to performing the same action against an arbitrary number of items Arrays also allow you to impose an order on multiple items As a reader of this book, you should be familiar with arrays, but you may not know how VB handles arrays internally This chapter is placed very early in the book because understanding how VB uses arrays is required for many other techniques discussed in later chapters
PDF 417 Encoder In .NET Framework
Using Barcode creator for Visual Studio .NET Control to generate, create PDF417 image in .NET framework applications.
At its lowest level, an array is simply a block of contiguous memory This block of memory is divided into a number of equally sized elements An element in an array is accessed via a zero-based index for the element by adding <lndex> * <Element Size> to the starting address of the memory block Once the memory for a given index has been located in the array, the resulting pointer is then treated as a non-array variable of the same type as the array You may think that this definition of an array leaves out multi-dimensional arrays and arrays with a nonzero base index However, these two cases are simply extensions of the one-dimensional, zero-based indexing system With a nonzero based array (Dim MyArray(5 To 8) As Long), the lower bound is simply subtracted
PDF 417 Encoder In Visual Basic .NET
Using Barcode generator for VS .NET Control to generate, create PDF-417 2d barcode image in VS .NET applications.
LEVERAGING ARRAYS
Creating Barcode In Java
Using Barcode generation for Java Control to generate, create bar code image in Java applications.
Element Number Byte Offset Decimal Value Memory
DataMatrix Printer In Java
Using Barcode creator for Java Control to generate, create ECC200 image in Java applications.
1 0 4 0 100000 1000 AO 86 01 00 E8 03 00 00 OA 00 00
Barcode Creator In Java
Using Barcode encoder for Java Control to generate, create barcode image in Java applications.
2 8 10 00 00 00 00
UCC.EAN - 128 Encoder In Java
Using Barcode maker for Java Control to generate, create GTIN - 128 image in Java applications.
4 6 5 3 24 12 16 20 0 -10 -1000 -1000000 00 F6 FF FF FF 18 FC FF FF 60 79 FE FF
Drawing Code-128 In Java
Using Barcode printer for Java Control to generate, create Code 128 Code Set A image in Java applications.
Figure 2 1
Generate EAN - 14 In Java
Using Barcode maker for Java Control to generate, create UPC Shipping Container Symbol ITF-14 image in Java applications.
The memory layout of a seven-element array of Longs
Paint EAN 13 In Visual Studio .NET
Using Barcode drawer for .NET framework Control to generate, create GS1 - 13 image in .NET framework applications.
from the index to form a zero-based index, which is then used to locate the element In a multi-dimensional array (the number of dimensions is also called the rank of the array), the vector of indices is used to calculate a zero-based index, which is then plugged into the <ArrayBase> + <lndex> * <Element Size> formula Programming languages support nonzero based and multi-dimensional arrays so that you don't always have to calculate a zero-based index yourself Since these more complex array types are just thinly veiled versions of a singledimensional array, I'll concentrate on zero-based, one-dimensional arrays
UCC - 12 Creator In .NET
Using Barcode creator for .NET framework Control to generate, create UPCA image in .NET applications.
Array Descriptors
Printing Barcode In C#
Using Barcode creator for .NET framework Control to generate, create barcode image in .NET framework applications.
Although the fundamental building block of any array is the memory block that contains the array's data, a VB array variable is not a pointer to the array's data block Instead, the array variable points to a structure that describes the contents of the array This structure is known as an array descriptor, and it has the type SAFEARRAY in the C + + headers (the standard OLE Automation structure used to describe an array) SAFEARRAY is called SafeArray in VBoostTypes6Tlb (SAFEARRAY is a keyword in IDL/ODL, so you can't use it as a type name) By describing its arrays with a SafeArray structure, VB can leverage a wide variety of array-manipulation routines provided by OleAut32DII and interoperate easily with external components For example, VB's ReDim statement maps to the SafeArrayCreate[Ex] API, ReDim Preserve maps to SafeArrayRedim, and Erase maps to SafeArrayDestroy The SafeArray descriptor plays the central role in array manipulation The descriptor holds information about the bounds of the array, the type of data contained in the array, and how the memory for the array was originally allocated This information not only allows all VB arrays to be managed with the SafeArray* API functions, it also allows arrays to be marshaled correctly when
Code 128A Recognizer In .NET Framework
Using Barcode reader for .NET Control to read, scan read, scan image in VS .NET applications.
Code 128 Code Set C Generation In VB.NET
Using Barcode generation for VS .NET Control to generate, create Code 128 image in Visual Studio .NET applications.
EAN-13 Generator In .NET Framework
Using Barcode generator for ASP.NET Control to generate, create EAN13 image in ASP.NET applications.