devxlogo

Don’t Use VarType to Test for Objects

Don’t Use VarType to Test for Objects

To test whether an argument passed to a procedure is an object or something else, use the IsObject function in place of the VarType function. Consider this routine:

 Sub TestType(arg As Variant)	If VarType(arg) = vbObject Then		Print "It's an object"	ElseIf VarType(arg) = vbString Then		Print "It's a string"	End IfEnd Sub

If you pass a control or an object that exposes a default property, the routine incorrectly reports the default property type:

 TestType Text1	' displays "It's a string"

This is the correct way to test for an object:

 	If IsObject(arg) Then		Print "It's an object"	ElseIf VarType(arg) = vbString Then		Print "It's a string"	End If

For more information on this topic, look on VB’s Help file under “VarType.”

See also  Does It Make Sense to Splurge on a Laptop?
devxblackblue

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist