Visual Basic 6 String Functions. VB has numerous built in. Most VB string handling functions return a. Len function, which. Instr and Instr. Rev. The functions that return. The first time I started trying to understand the VB6 string functions I was somewhat confused. This tutorial will walk you through all the different ways you can us VB to handle strings. If you are still confused feel free to post a comment and hopefully we can help get you cleared up. Also there are many other string related tutorials on this site so feel free to browse around. Function Len. Description Returns a Long containing. Syntax LenstringWhere string is the. Example lng. Len LenVisual Basic lng. Len 1. 2Function Mid or MidDescription Returns a substring. Syntax Midstring. The Mid function syntax. Required. String expression from which. Required. Long. Character position in string at which the part to be taken begins. If. start is greater than the number of characters in string, Mid returns a. Optional. Long. Number of characters to return. If omitted or if there are fewer than. Example str. Substr MidVisual Basic, 3, 4 str. Substr sualNote Mid can also be used on the left side of an assignment. Test Visual Basic. Midstr. Test, 3, 4 xxxx. Test now contains Vixxxx BasicIn VB6, the Replace function. Radan2400/PC/PC%20Parallel%20and%20Serial%20Port%20Interfacing_files/VBHexTerm.gif' alt='Serial Port Vb6 Mscomm' title='Serial Port Vb6 Mscomm' />Function Left or LeftDescription Returns a substring. Syntax Leftstring. The Left function syntax. Required. String expression from which the. Required Long. Numeric expression indicating. Hi, I need to convert an old VB6 program that used the MSCOMM control to read and write data to an RS232 serial port. The old VB6 program used code code. I have a digital weighing scale I need to connect to the PC using RS232 communication port. Every time I weigh an object, automatically the resultweight will display. Other than looping from 1 to 32 and trying open each of them, is there a reliable way to get COM ports on the system All Index This page lists all of VB Helpers source code, examples, tutorials, essays, and book content. For a more focused listing, go to the Index Categories or. Welcome to my tutorial on Serial Port Communication in VB. Net. Lately Ive seen a lot of questions on how to send and receive data through a serial port, so I thought. Now that we have created our serial port object and opened the port, we now want to read from the serial port. Here are the basic read functions there are several. If 0, a zero length string is. If greater than or equal to the number of characters in string, the. Example str. Substr LeftVisual Basic, 3 str. Substr Vis. Note that the same thing could be accomplished with Mid. Substr MidVisual Basic, 1, 3Function Right or RightDescription Returns a substring. Syntax Rightstring. The Right function syntax. Required. String expression from which the rightmost characters are returned. Required Long. Numeric expression indicating. If 0, a zero length string is returned. FHD/6TN5/HDOW3Q9Z/FHD6TN5HDOW3Q9Z.MEDIUM.jpg' alt='Serial Port Vb6 Mscomm' title='Serial Port Vb6 Mscomm' />If greater than or equal to the number of characters in string, the entire. Example str. Substr RightVisual Basic, 3 str. Substr sic. Note that the same thing could be accomplished with Mid. Substr MidVisual Basic, 1. Function UCase or UCaseDescription Converts all lowercase. Any existing uppercase letters and. Syntax UCasestringExample str. New UCaseVisual Basic str. New VISUAL BASICFunction LCase or LCaseDescription Converts all uppercase. Any existing lowercase letters and. Syntax LCasestringExample str. Serial Port Vb6 Mscomm' title='Serial Port Vb6 Mscomm' />New LCaseVisual Basic str. New visual basicFunction Instr. Description Returns a Long specifying. The search starts either at the. Syntax In. Strstart,. The In. Str function syntax. Optional. Numeric expression that sets the starting position for each search. If. omitted, search begins at the first character position. The start. argument is required if compare is specified. Required. String expression being searched. Required. String expression sought. Optional numeric. A value of 0 the default specifies a binary. A value of 1 specifies a textual case insensitive. Examples lng. Pos InstrVisual Basic, a. Pos Instr6, Visual Basic, a. Pos 9 starting at position 6. Pos InstrVisual Basic, A. Pos 0 case sensitive search. Pos Instr1, Visual Basic, A, 1. Pos 5 case insensitive searchFunction Instr. Rev. Description Returns a Long specifying. The search starts either at the. Introduced in VB 6. Syntax In. Str. Revstring. The In. Str function syntax. Required. String expression being searched. Required. String expression sought. Optional. Numeric expression that sets the starting position for each search. If. omitted, search begins at the last character position. Optional. numeric. A value of 0 the default specifies a binary case sensitive. A value of 1 specifies a textual case insensitive search. Examples lng. Pos Instr. RevVisual Basic, a. Pos Instr. RevVisual Basic, a, 6. Pos 5 starting at position 6. Pos Instr. RevVisual Basic, A. Pos 0 case sensitive search. Pos Instr. RevVisual Basic, A, 1. Pos 9 case insensitive search. Note that this last example leaves a placeholder for the start argument. Notes on Instr and Instr. Rev          Something to watch out for is. Instr and Instr. Rev both accomplish the same thing except that. Instr. Rev processes a string from last character to first, while Instr processes. The Instr arguments are start, string. Instr. Rev arguments are string. The Instr function has been. BASIC, whereas Instr. Rev was not introduced. VB 6.          Built in vb constants. Binary. Compare for 0 case sensitive searchvb. Text. Compare for 1 case insensitive searchFunction String or StringDescription Returns a string. Syntax Stringnumber. The String function. Required Long. Length of the returned. Required Variant. This. argument can either be a number from 0 to 2. ASCII. character code of the character to be repeated or a string expression whose. Examples str. Test String5, a. Test aaaaa. str. Test String5, 9. Test aaaaa 9. ASCII code for aA list of the ASCII. Function Space or SpaceDescription Returns a string. Syntax SpacenumberWhere number is the number of blank spaces. Examples str. Test Space5 str. Test Function Replace or ReplaceDescription Returns a string in which. Introduced in VB 6. How To Use Krone Insertion Tool here. Syntax Replaceexpression, find, replacewith, start, count, compareThe Replace function. Required. String expression containing substring to replace. Required. Substring being searched for. Required. Replacement substring. Optional. Position within expression where substring search is to begin. If. omitted, 1 is assumed. Optional. Number of substring substitutions to perform. If omitted, the default value. Optional. Numeric value indicating the kind of comparison to use when evaluating. Built in. vb constants can be used for the compare argument vb. Binary. Compare for 0 case sensitive searchvb. Text. Compare for 1 case insensitive searchExamples str. New. Date Replace0. New. Date 0. 8 3. Function Str. Reverse or. Str. ReverseDescription Returns a string in which. Introduced in VB 6. Syntax Str. ReversestringExamples str. Test Str. ReverseVisual Basic str. Test cisa. Blausi. VFunction LTrim or LTrimDescription Removes leading blank. Syntax LTrimstringExamples str. Test LTrim Visual Basic. Test Visual Basic Function RTrim or RTrimDescription Removes trailing blank. Syntax RTrimstringExamples str. Test RTrimVisual Basic str. Test Visual BasicFunction Trim or TrimDescription Removes both leading and. Syntax TrimstringExamples str. Test Trim Visual Basic str. Heissluft Grill Turbo 3000 Manual there. Test Visual Basic. Note Trimx accomplishes the same thing as LTrimRTrimxFunction Asc. Description Returns an Integer. ASCII character code corresponding to the first letter in a. Syntax AscstringExamples int. Code Asc int. Code 4. Code AscABC int. Code 6. Function Chr or ChrDescription Returns a string. Syntax ChrcharcodeWhere charcode is a. Examples str. Char Chr6. Char AASCII Character Codes 0 through 1. NA3. 2space6. 49. NA3. 3 6. 5A9. 7a. NA3. 46. 6B9. 8b.