Hi,
TestComplete 9 supports the XtraVerticalGrid control for .NET applications and the ExpressVerticalGrid control for VCL applications. So, the way of testing your control depends on what application type (VCL or .NET) you are using. To learn how to work with these controls, please refer to the following articles:
Developer Express XtraVerticalGrid Support and
Developer Express ExpressVerticalGrid Support.
If you have any problems with the control used in your tested application, please clarify the situation in detail.