The names of procedures ,variables and constants you declare in Visual Basic have to follow certain rules.

• they must begin with a letter
• they cant contain embedded periods or characters that specify a data type (e.g ! or %)
• cant be longer than 255 characters , names for forms / controls mustnt exceed 40 characters
• cant be the same as restricted keywords
• body of constant and variable names should be mixed case with capitals beginning each word
• constant and variable names should be prefixed to indicate their data type and scope

Variable Prefixes

Here are some examples :

 blnAccepted          bytAge       strFirstName    

There is also suggested prefixes for controls .

Variable scope prefixes

Here is an example

msngTodayTemp  : would be a module level single that could hold  today's temperature.