Logs an warning message and a screenshot to the TrueLog file that is written during test execution.
LogWarning (message, [screenshotMode]); 
                  		LogWarning (message, [screenshotMode]) 
                  		| Variable | Description | 
|---|---|
| message | The text to write to the TrueLog file. String. | 
| screenshotMode | Optional: Defines whether a screenshot of the complete desktop, the active application, or the active window should be logged. If not set, no screenshot is logged. Enum. | 
// C# code
LogWarning ("Baseline file is missing."); 
               		'VB .NET code
LogWarning ("Baseline file is missing.")