I have made a 3D Object rotation working example through buttons. This Code is helpful for beginners....
BASIC EXAMPLE----

Here is the code below:

Step 1 : Create 5 buttons namely - reset_button, rotate_x_up, rotate_x_down, rotate_y_left, rotate_y_right

a) reset_button to reset the object to its actual position

b) rotate_x_up, rotate_x_down buttons to rotate the object on X axis

c) rotate_y_left, rotate_y_right buttons to rotate the object on Y axis

Note :  write all piece of code on frame itself not on buttons

Step 2 : Create 4 functions namely - reset_obj, rotate_X_UP, rotate_X_DOWN, rotate_Y_LEFT, rotate_Y_RIGHT

 Note :  The buttons will call the function on mouse click events

Step3: Assign "object_3d" as reference name to your 3d object.

Below is the code u can understand easily.

/////////////////////////////////////////////////Code//////////////////////////////////////////////////////////////////

///Reset 3D object to its Actual Position
function reset_obj(eventObject:MouseEvent) {
object_3d.RviReset();
}

reset_button.addEventListener(MouseEvent.CLICK, reset_obj);

////////////////////////////////////////////////////////////

///Rotate 3D Object on X axis////////////////////////////////////
function rotate_X_UP(eventObject:MouseEvent) {
object_3d.RviAutoX=1;
}

function rotate_X_DOWN(eventObject:MouseEvent) {
object_3d.RviAutoX=-1;
}

function rotate_X_Stop(eventObject:MouseEvent) {
object_3d.RviAutoX=0;
}

rotate_x_up.addEventListener(MouseEvent.MOUSE_DOWN, rotate_X_UP );
rotate_x_down.addEventListener(MouseEvent.MOUSE_DOWN, rotate_X_DOWN );
rotate_x_up.addEventListener(MouseEvent.MOUSE_UP, rotate_X_Stop);
rotate_x_up.addEventListener(MouseEvent.MOUSE_OUT, rotate_X_Stop);
rotate_x_down.addEventListener(MouseEvent.MOUSE_UP, rotate_X_Stop);
rotate_x_down.addEventListener(MouseEvent.MOUSE_OUT, rotate_X_Stop);

////////////////////////////////////////////////////////////////////

///Rotate 3D Object at Y axis////////////////////////////////////
function rotate_Y_LEFT(eventObject:MouseEvent) {
object_3d.RviAutoY=1;
}

function rotate_Y_RIGHT(eventObject:MouseEvent) {
object_3d.RviAutoY=-1;
}

function rotate_Y_Stop(eventObject:MouseEvent) {
object_3d.RviAutoY=0;
}

rotate_y_left.addEventListener(MouseEvent.MOUSE_DOWN, rotate_Y_LEFT );
rotate_y_right.addEventListener(MouseEvent.MOUSE_DOWN, rotate_Y_RIGHT );
rotate_y_left.addEventListener(MouseEvent.MOUSE_UP, rotate_Y_Stop);
rotate_y_left.addEventListener(MouseEvent.MOUSE_OUT, rotate_Y_Stop);
rotate_y_right.addEventListener(MouseEvent.MOUSE_UP, rotate_Y_Stop);
rotate_y_right.addEventListener(MouseEvent.MOUSE_OUT, rotate_Y_Stop);

////////////////////////////////////////////////////////////////////

Thanks for this....very useful. Interseting use of RviAutoX and RviAutoY

 Is it possible to zoom in and out from the model ???

H.