Designing Games with Game Maker - YoYo Games

cr_handpoint
cr_size_all
In particular, to hide the mouse cursor, use cr_none as value.
window_get_cursor() Returns the cursor used in the window.
window_set_color(color) Sets the color of the part of the window that is
not used for displaying the room.
window_get_color() Returns the window color.
window_set_region_scale(scale,adaptwindow) If the window is larger
than the actual room normally the room is displayed in a region centered in
the window. It is though possible to indicate that it must be scaled to fill the
whole or part of the window. A value of 1 is no scaling. If you use a value of 0
the region will be scaled to fill the whole window. If you set it to a negative
value it will be scaled to the maximal size inside the window while maintaining
the aspect ratio (this is often what you want). adaptwindow indicates
whether the window size must be adapted if the scaled room does not fit in.
Adapting the window is only effective when the scale factor is positive.
window_get_region_scale() Returns the scale factor for the drawing
region.
The window has a position on the screen and a size. (When we talk about position and size we
always mean the client part of the window without the borders.) You can change these
although you hardly ever do from within your game. Normally they are determined
automatically or by the player. The following functions can be used to change the window
position and size. Note that these functions deal with the windowed mode. If the window is in
full screen mode they can still be used but will only have effect when switching full screen
mode off.
window_set_position(x,y) Sets the position of the (client part of the)
window to the indicated position.
window_set_size(w,h) Sets the size of the (client part of the) window to
the indicated size. Note that is the indicated size is too small to fit the drawing
region it is kept large enough for the region to fit it.
window_set_rectangle(x,y,w,h) Sets the position and size of the
window rectangle. (Does both previous routines in one step.)
window_center() Centers the window on the screen.