Causes the compiler to treat the first occurrence of a warning as an error.

/warnaserror[+ | -]

Arguments

+ | -

By default, /warnaserror- is in effect; warnings do not prevent the compiler from producing an output file. /warnaserror, which is the same as /warnaserror+, causes warnings to be treated as errors.

Remarks

Subsequent occurrences of the same warning are reported as warnings. The compiler produces no output file.

To set /warnaserror in the Visual Studio integrated development environment

1. Open the project's Property Pages dialog box. For details, see <Projectname> Property Pages Dialog Box.
2. Click the Configuration Properties folder.
3. Click the Build property page.
4. Modify the Treat compiler warnings as errors property.

To set /warnaserror programmatically

• See TreatWarningsAsErrors Property.

Example

The following code compiles in.vb and directs the compiler to display an error for the first occurrence of every warning it finds:

vbc /warnaserror in.vb

See Also

Visual Basic Compiler Options | Sample Compilation Command Lines