FAQ #3610, published on 2011-11-18
WINDEV, WEBDEV, WINDEV MOBILE
WINDEV MOBILE error: "No Android phone was detected" with Samsung Galaxy Tab
WINDEV needs an ADB module to connect to the device, but the module provided by Google is not working with the Galaxy Tab.
   
Solution : install an SDK upgrade from Samsung.

http://innovator.samsungmobile.com/down/cnts/toolSDK.detail.view.do?platformId=1&cntsId=9480

Note that Eclipse is not required, just run the SDK Setup.exe (located at the root folder), then follow the instructions given from point 2 to the end.

Once the SDK updated (version 2.2 preferably), restart WINDEV MOBILE.