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As in C and C++, it is not easy to give input to an application in Java. This is sample code to check whether the given number is even or
This code will allow you to launch a file with its associated program. #If Win32 ThenDeclare Function ShellExecute Lib “shell32.dll” Alias “ShellExecuteA” _(ByVal hwnd As Long, ByVal lpOperation As String,
Since Crystal Reports files are stored in a binary format, it’s impossible to accurately track (using SourceSafe, for example) the changes you and your colleagues make.To help remedy this situation
First of all, create a string array with the elements of a browser exe path and the file you desire to open in your browser. Next, create an instance of
How do you use the LogonUser API in VB?1. Call RevertToSelf (this is the critical step as it allows the code torun under the System account)2. Call LogonUser3. Call ImpersonateUserThis
he whole set of COM+ services are madeavailable in .NET via a set of classes gathered into theSystem.EnterpriceServices namespace. Such classes are implemented in the sharedassembly named System.EnterpriseServices.dll. Almost all
In a few cases, in particular when running MsDos batch files from within a VB application, you may want to determine the ERRORLEVEL set by an external application. You can’t
There is no built-in VB function that lets you know whether a control – such as a ListBox – is currently displaying a vertical scrollbar. Here’s a pair of functions
Before posting an Internet request you should check that the user has entered a valid Internet address. You can do this with a parsing routine, or use the following routine
Frequently you need to sort arrays of records using multiple keys. This may be required since one single key does not uniquely identify a record (e.g. you may need both
The GlobalMemoryStatus API function returns detailed information about the current load on the physical and virtual memory. You can use the following code to display the current amount of free
his article shows you an easy way to generate PDF files dynamically for display in a browser by using an XSL vocabulary called XSL-FO (Extensible Stylesheet Language Formatting Objects). A
This code checks if a given string is a palindrome. Public Function IsPalindrome(strToCheck As String) As BooleanDim iForward As IntegerDim iBack As IntegerDim iMid As IntegerDim bPalindrome As BooleanIsPalindrome =
Instead of depending on the compiler to instantiate your template, youshould explicitly instantiate them using the following statement: template class vector; // for class instantiationtemplate int& vector::operator[] (int); // for
Beginning with SQL Server 2000, Microsoft added support for SQL-XML interoperability. They did this by expanding some statements that we all know
Memory is precious in Palm OS, so you can’t afford any memory leaks in programs. Therefore, it’s very essential to detect any memory leaks. To do this put breakpoints in
Beginning with SQL Server 2000, Microsoft added support to retrieve data from SQL Server databases by using an URL address. To do this, you must create a virtual root, that
Everybody knows that the WM_PAINT message is passed to a window whenever it needs to be painted. Usually, we code all of our painting instruction in the handler of WM_PAINT,
In order to increase the efficiency of your linear searching, add the item you are searching at the end of the list (either an array or linked list) and write
The C++ runtime library includes a heap manager (subroutines responsible for maintaining the heap). The heap manager does bookkeeping to keep track of which parts of the heap have been
This is a simple way to find out the word count in a comma delimited string: declare @mystring varchar(200)set @mystring=”vb,asp,sqlserver,html”select (len(@mystring)-len(replace(@mystring,’,’,”))+1) The following code will parse the delimited string: –variable
Debugging a multi-threaded program in Visual C++ may be difficult, especially when switching between multiple threads using the Debug/Threads menu. One efficient way to distinguish threads during debugging is to
If you find yourself constantly commenting and uncommenting bits of code during development, this tip could come in handy. Normally, you’d do something like this: #define /* #undef */ _FOObool
CRect, Csize, and CPoint classes all have default constructors. It would follow that they should initialize all members to zero, but they don’t! Because of this, the following function has
Normally, the Right() Function VB returns only the Length specified from the End. If you want to extract the Right portion from any index of the String you have to
Sometimes, while performing String operations, you may want to extract part of the string from the main string–from the StartPosition to the EndPosition specified. The problem with the Mid() is
Where NOT to use “_”:1. SQL stringsWhy? Because, during debugging, you may have to modify a SQL string because you need to add a field, or remove a field, correct
Instead of working with text as strings and using the mid, left, and right functions, it’s better to convert the string to an ANSI bytearray. This can be done with
Static blocks or static initializers don’t exist within a method body.The static block code executes only once when the class is loaded. The static block is mainly used to load
The following are the http properties for the HttpURLConnection:1) http.proxyHost (default: ) – defines the Proxy through which the request should be routed. 2) http.proxyPort (default: 80 if http.proxyHost specified)-
