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Visual Basic 4 / 5 / 6 Discussion Thread
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Jul 8th, 2007

Error Check

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I have a program where there are text boxes that accept values and then a command button is pressed. I need to know how to let the program check if the values entered are negative or anything that isn't a number. I also need the program to understand that if the text box is empty it should read that as a value of zero instead of just giving me a runtime error.

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sk8ndestroy14

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Posting Virtuoso

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Jul 8th, 2007

Re: Error Check

You can use the function IsNumeric to check if a certain string is numeric or not. It is numeric if it contains only numbers and only one "-" (negative sign). If no text is entered in the textbox, its text value is "". You can use If/Else selection for this.

scudzilla

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Junior Poster

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Jul 9th, 2007

Re: Error Check

Thanks for helping but now I have a few other problems with the same program. I don't know how to change a datatype from variant to currency part way through a program.

sk8ndestroy14

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Posting Virtuoso

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Jul 9th, 2007

Re: Error Check

Nevermind. I figured out how to change datatypes. I finished the program. Thanks for the help.

Last edited by sk8ndestroy14; Jul 9th, 2007 at 1:14 am.

sk8ndestroy14

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Posting Virtuoso

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This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

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