The Daily Newbie - Using the Chr() function

Description

To show the usage of the Chr() function.

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Submitted On
By	Matthew Roberts
Level	Beginner
User Rating	5.0 (10 globes from 2 users)
Compatibility	VB 3.0, VB 4.0 (16-bit), VB 4.0 (32-bit), VB 5.0, VB 6.0, VB Script, ASP (Active Server Pages) , VBA MS Access, VBA MS Excel
Category	Coding Standards
World	Visual Basic
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<title>Daily Newbie - 04/29/2001</title>

 

The Daily Newbie

“To Start Things Off Right”

Fourth Edition                                                          April 28, 2001                                                                          Free

 

 

Today's command, Chr() is almost a must-know for a lot of string manipulation and should be one of the fundimental tricks in your VB coding bags. If you have read the previous Newbie articles, you already know about the Asc() function. The Chr() function is a compliment of it. While the Asc() Function returns an ASCII code for a character, the Chr() function returns a character for an ASCII character.

Today’s Keyword:                               Chr()

Name Derived From:         Character - a symbol (as a letter or number) that represents information; also : a representation of such a character that may be accepted by a computer - Webster's online dictionary.

Used for                                   Converting an ASCII character to a string character.

VB Help Description:             Returns a String containing the character associated with the specified character code.

Plain English:                           Takes a ASCII Character code and converts it to a "normal" text character.

Syntax:                                     Chr(ASCII Code)

Usage:                                      strCharacter =Chr(65)  

Copy & Paste Code:

Today's code snippet will print a list of ACII codes and their equivilent character values in the debug window.

			Dim intASCII As Integer
			For intASCII = 49 To 122
				Debug.Print Chr(intASCII)
			Next intASCII

 

Notes: 

The reason that the Chr() function is so important is that a lot of things in Visual Basic as based on ASCII values. For example, in the KeyPress() event of an object, the value that is passed in as the pressed key is an ASCII value. If you are wanting to display each character on the keypress event, you can do it with this code:

		Private Sub Form_KeyPress(KeyAscii As Integer)
			MsgBox Chr(KeyAscii)
		End Sub

Since the KeyAscii is a VB-defined parameter, the ability to convert it to a character value is pretty important. Chr() Makes this simple. I used Chr() in a simple "word scrambling" project that you can view by clicking here.



Tomorrow's Keyword: Command()