Article ID: 161153 - View products that this article applies to.
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The Assert method of the Debug object allows monitoring of an expression for failure conditions.
The following syntax is used for the Assert method:
Debug.Assert (expression)The Assert method syntax has the following object qualifier and part:
The Assert method forces a design-time break at the Assert statement when the expression evaluates to False. If the expression evaluates as True, program operation continues. For example:
Part Description ---- ----------- Debug Required. The Assert method only applies to the Debug object. expression Required. Any logical expression.
If you call myFunction as:
the program continues as normal. However, passing a zero as any one of the parameters forces a break. The following example breaks at the Assert statement:
The above example allows testing for inappropriate parameters to protect against a division by zero error. If a break occurs at the Assert statement, you can check the locals window to determine which value is inappropriate. This is especially useful when the argument values come from other functions:
The Assert method is only used for debugging. During compiling, Microsoft Visual Basic always removes Assert statements from the final code. There is no workaround for this behavior.
Article ID: 161153 - Last Review: July 13, 2004 - Revision: 3.1