Hi,
this code presses the '0' key:

declare keybd_event in Win32API integer, integer, long, long
* 48=0x30 - virtual-key code of '0'
keybd_event(48,0,0,0) && key pressed
keybd_event(48,0,2,0) && key released

>Is there is an API function to place a char in the keyboard buffer.
>I have saw that microsoft provided a keyboard similar called on-screen keyboard that works fine to input a char into the numberic field.