This function synthesizes keystrokes, stylus and mouse motions, and button clicks.
UINT SendInput( UINT nInputs, LPINPUT pInputs, int cbSize );
Specifies how many structures pInputs points to.
Pointer to an array of INPUT structures. Each structure represents an event to be inserted into the keyboard or mouse input stream.
Specifies the size of an INPUT structure. If cbSize is not the size of an INPUT structure, the function will fail.
The number of events that the function inserted into the keyboard or mouse input stream indicates success. To get extended error information, call GetLastError.
Windows Embedded CE does not support the INPUT_HARDWARE value in the type field of the INPUT structure referred to by the pInputs parameter.
The SendInput function inserts the events in the INPUT structures serially into the keyboard or mouse input stream. These events are not interspersed with other keyboard or mouse input events inserted either by the user (with the keyboard or mouse) or by calls to keybd_event, mouse_event, or other calls to SendInput.