Is there any way to adjust mouse sensitivity?

This is a simple way doing it :

; Title

AppTitle "Mouse Sensitivity"


; Graphics

Graphics 640, 480, 16, 1

SetBuffer BackBuffer()



; Global Mouse

Global mouse_x = 320, mouse_y = 240, mouse_sens# = 2.0

MoveMouse mouse_x, mouse_y

HidePointer : Color 0, 255, 0



; Main Program

While KeyHit(1) = False


; Mouse Sensitivity

mouse_x = mouse_x + (MouseXSpeed() * mouse_sens#)
mouse_y = mouse_y + (MouseYSpeed() * mouse_sens#)


; Move Mouse Inside Screen

If mouse_x < 10 Then mouse_x = 10
If mouse_y < 10 Then mouse_y = 10

If mouse_x > 630 Then mouse_x = 630
If mouse_y > 470 Then mouse_y = 470


; Change Mouse Sensitivity

If KeyDown(203) Then mouse_sens# = mouse_sens# - 0.1
If KeyDown(205) Then mouse_sens# = mouse_sens# + 0.1

If mouse_sens# < 0.1 Then mouse_sens# = 0.1
If mouse_sens# > 10.0 Then mouse_sens# = 10.0



; Clear Screen

Cls



; Draw Mouse

Text mouse_x - 2, mouse_y - 2, "* "


; Text Sensitivity

Text 320, 32, "Mouse Sensitivity " + mouse_sens#, 1


; Flip

Flip




; End Program

Wend


End

Change Mouse Sensitivity with Left and Right cursor

Hope it helps, its the same thing Electronin said you should do :)