Hi Nipendra ,
Firstly , since this forum does not have any provision to either upload files , or attach files to posts , what you can do is upload your file to any file-sharing website such as RapidShare , SpeedyShare , Hotfile , SkyDrive , GoogleDocs , DropBox , give others permission to access / download the file , and then post the access link here , in this same topic.
Secondly , if I have understood you correctly , you have two buttons labelled Value1 and Value2 ; you have also mentioned two ranges B1:B17 , which is 17 rows , and C20:C34 , which is 15 rows.
Now , you say that what you wish to do is to be able to select one or more values from the range B1:B17 , and then click on any of the two buttons Value1 and Value2 ; the selected value(s) should then be added to the second range C20:C34.
There is so much more to be understood that I cannot understand what kind of code can be developed , with whatever information is available :
1. What is Value1 supposed to do , and what is Value2 supposed to do ?
2. How are the selected value(s) to be added to the values in the range C20:C34 ? I can understand that if you select one value , that one value can be added to each of the 15 values in C20:C34 ; but suppose you select 3 values from the range B1:B17 ; how are these 3 values to be added to the range C20:C34 ?
I think the best way forward would be to upload your file , and then give an example of what you want to do , with reference to specific cells and buttons.
Narayan