by using qtp we record the script,that itself a test case or we should write test case manully in real time.

Hi,

Manually written test cases are converted into automated scripts. Using QTP you not only generate the script by recording and play back but also by descriptive programming.

For a application under test as a first step it will be tested manually, once the application is stable, and it requires many changes for which lot of regression test cases are to be executed we go for automation. QTP is one of the best tool available in the market for automation.

Regards,
Ganesan

what is descriptive programming.
give me with some explain

Descriptive Programming is a way of writing test script without recording the actions. You should know VB Script to write descriptive program in QTP. While using descriptive programming the objects gets created dynamically during the run time and destroyed at the end of test run. But in the record and playback all the objects are identified and stored in the object repositary