Thanks Briga, dotnethead, and Steve for your replies. As suggested by briga, i ran a test program with loop of 9999999. When i run the test about many times, each time the result was different. Some times Case #1,#2,#3 all took same time, at times #1 was the fastest, at times #2 , another time #3 and at other times there was a tie b/w the cases. so could not reach a conclusion. As Steve pointed out [it was the reason i posted the question] #1 involves an implicit type conversion [integer is converted to boolean], #2 a comparison and #3 an explicit type conversion, it is difficult to say which would run faster. After much thought i too reached the conclusion that #2 is better [it atleast explains the code better] Thanks every one

Which of the following is faster : 1. if drRows.Length then end if 2. if drrows.length > 0 then end if 3. if Cbool(drrows.length) then end if Any Suggestions? Thanks

Hi, i have made a form which follows the following logic :- The form displays various panels which are used to get criterias from the user. then form.layout is suspended and the following algorithm executes : 1. Based on these criterias i add various column to a datatable say dtRecordsReturned. 2. Then datagridcolumnstyles [some of them are instances of classes i inherited from datagridcolumnstyle] are made and added to a datagridtablestyle , which is then added to the TableStyle property of a datagrid say dgRecordsReturned. 3. the dtRecordsReturned is then bound to a dataview dvRecordsReturned. 4. dvRecordsReturned is bound to the dgRecordsReturned. 5. then records(rows) are added to dtRecordsReturned by executing a sqlQuery. 6. Then Values of some of the columns of each row are set according to the criterias got from the user. While doing this some special conditions may arise, which i am displaying to the user by setting an errormessage on that particulare column by calling .SetColumnError(columnname,strSpecialContidionDescription). 7. then the panel [pnlRecordsReturned] which contains dgRecordsReturned is brought to the front by calling pnlRecordsReturned.BringToFront(). 8.Finally the form.Resumelayout() is called. Now the Problem i am facing is that though the ColumnErrorIcon is displayed in the columns, no tooltip message pops up when the cursor is hovered over the icon. I tried using .RowError instead of .SetColumnError still the result is similar. ErrorIcon appears in the rowheader but no tooltip message pops up. Any Suggestions? Thanks