Many developers mistakenly believe that any error inside a transaction will make the transaction fail and automatically rollback. However, this is true only for fatal errors, such as most errors
Private Declare Sub CopyMemory Lib “kernel32” Alias “RtlMoveMemory” (dest As _ Any, source As Any, ByVal Bytes As Long)’ Uncompress a block of data compressed with RLECompress” Returns TRUE if
You may retrieve a few important information about a connection to SQL Server by querying the server through appropriate @@ global variables. For example, the following routine takes an ADO
‘ get the IE installation path, or a null string if it isn’t installed” NOTE: requires the GetRegistryValue routineFunction InternetExplorerPath() As String Const HKEY_LOCAL_MACHINE = &H80000002 ‘ get the path
Private Declare Function SystemParametersInfo Lib “user32” Alias _ “SystemParametersInfoA” (ByVal uAction As Long, ByVal uParam As Long, _ ByRef lpvParam As Any, ByVal fuWinIni As Long) As LongConst SPI_SETDESKWALLPAPER =
One of the most effective optimization techniques consists of caching data inside Application or Session variables. However, you should pay attention to how you reference to the elements in those
Printing is one of the things that you can’t do directly from withing ASP: to have a printout of your data from ASP you must instantiate a COM component –
The SQL language includes the SUM() aggregate function, that evaluates the sum of all the values in a given column, but it doesn’t include a PROD() function that evaluates the
At times you may need to swap the values of two columns of the same SQL Server table. For example, suppose that you realized that the fname column of the