Automate mouse click in windows with script/batch file

nircmd is capable to do some basic mouse stuff. Check mouse.bat - self-compiled C# class (c# compiler is installed by default from everything from vista and above) capable to command the mouse from command line (also pretty basic but can do a little bit more than nircmd). with mouse.bat -help you can see the help and some example actions.

here's example usage:

Examples:

::clicks at the current position
call mouse click

::double clicks at the current position
call mouse doubleClick

::right clicks at the current position
call mouse rightClick

::returns the position of the cursor
call mouse position

::scrolls up the mouse wheel with 1500 units
call mouse scrollUp 150

::scrolls down with 100 postitions
call mouse scrollDown 100

::relatively(from the current position) moves the mouse with 100 horizontal and 100 vertial postitions
call mouse moveBy 100x100

::absolute positioning
call mouse moveTo 100x100

::relative drag (lefclick and move)
call mouse dragBy 300x200

::absolute drag
call mouse dragTo 500x500

Just in case some poor soul stumbles upon this one day, using AutoIt that @rojo suggested above - This is the script that I wrote that accomplishes what I need:

; Initiate Script
Main()

Func Main()
    ; Infinite loop
    While 0 < 1
        If CheckTime() == true Then
            If CheckInternetConnection() == true Then
                ; Internet Connection is true
                ; So no worries
            Else
                ; Internet Connection is false
                ; Perform mouse click
                MouseClick("left")
            EndIf       
        EndIf
        ; Sleep for 15 minutes
        Sleep(60000 * 15)
    WEnd
EndFunc

; The function checks if the current time is between 00:00 and 05:00
Func CheckTime()
    If @Hour >= 00 AND @Hour <= 05 Then
        Return true
    Else
        Return false
    EndIf
EndFunc

; The function checks if currently is a internet connection
Func CheckInternetConnection()
    Local $Connected = false
    $ping = Ping("www.google.com")
    If $ping > 0 Then
        $Connected = true
    EndIf
    Return $Connected
EndFunc

And there you go, just save the code in a file with a .au3 file extention, double click and enjoy.

I'd use AutoIt. IMHO, autoit is more appropriate for running scripts where a systray icon might be preferable to a console window. AutoIt can check the time, ping something, automate a mouse click, and probably whatever else you need.