I'm using IC5141 usr6 and recently I find that in a schematic,when I press "<key>w" to create wire,there will popup a "Add wire" form and the starting point has been plotted in the schematic .But before only when I pressed F3 this form would appear and it would not plot the starting point.Now my question is that how to close the form in default?I try to modify the arguments of schHiCreateWire function ,but it seems no use.
Something in your environment has turned on "novice" mode (or turned off expert mode). If you go to Options->User Preferences (in the CIW), there's a checkbox there called "Options Displayed When Commands Start". If that's on, you'll get the behaviour you describe.
This can be controlled a few ways:
hiGetCIWindow()->expertMode=t ; is the same asenvSetVal("ui" "showOptionForms" 'boolean nil)
My guess is that you have a .cdsinit or .cdsenv file which is setting showOptionForms to t, or expertMode to nil.