If anyone is interested, this code allows the same gauge to be used to start recip engines in both sims...char engine1_gauge_name[] = GAUGE_NAME;extern PELEMENT_HEADER engine1_list;extern MOUSERECT engine1_mouse_rect[];GAUGE_HEADER_FS700(GAUGE_W, engine1_gauge_name, &engine1_list, engine1_mouse_rect, NULL, 0, 0, 0);BOOL FSAPI engine1_mouse_click_down( PPIXPOINT relative_point, FLAGS32 mouse_flags){ send_key_event(KEY_MAGNETO1_DECR,0); return FALSE;}BOOL FSAPI engine1_mouse_click_up( PPIXPOINT relative_point, FLAGS32 mouse_flags){ send_key_event(KEY_MAGNETO1_INCR,0); return FALSE;}MOUSE_BEGIN( engine1_mouse_rect, HELP_NONE, 0, 0 ) MOUSE_TOOLTIP_TEXT_ID (TOOLTIPTEXT_ENG1_MAGNETO_SWITCH,NULL) MOUSE_CHILD_FUNCT(1,1,50,93,CURSOR_DOWNARROW,MOUSE_LEFTSINGLE | MOUSE_DOWN_REPEAT,engine1_mouse_click_down) MOUSE_CHILD_FUNCT(51,1,50,93,CURSOR_UPARROW,MOUSE_LEFTSINGLE | MOUSE_DOWN_REPEAT,engine1_mouse_click_up)MOUSE_ENDFLOAT64 FSAPI engine1_icon_cb( PELEMENT_ICON pelement){ double mag; lookup_var(&mag_left[1]); lookup_var(&mag_right[1]); mag = (mag_left[1].var_value.n * 2.) + mag_right[1].var_value.n; if ( mag > 2. ) mag = mag + pelement->source_var.var_value.n; return mag;}MAKE_ICON(engine1_Icon,OffBitmap,NULL,NULL,IMAGE_USE_ERASE | IMAGE_USE_TRANSPARENCY | BIT7,0,11,36,RECIP_ENGINE1_STARTER,engine1_icon_cb,ICON_SWITCH_TYPE_STEP_TO,5,0,0)PELEMENT_HEADER engine1_IconList[] = {&engine1_Icon.header,NULL};MAKE_STATIC(engine1_Static,BackgroundBitmap,&engine1_IconList,NULL,IMAGE_USE_ERASE | IMAGE_USE_TRANSPARENCY | BIT7,0,0,0)PELEMENT_HEADER engine1_list = &engine1_Static.header;Doug

Hi Doug,Euhhh....Could you translate that to XML please ....LOLCheers, Rob

Hmm... You know how well I program XML, don't you. :-)Something like: (A:Recip eng left magneto:1,bool) 2 * (A:Recip eng right magneto:1,bool) +The above display element from the FSDZ Connie; the mouse function from the default FS9 Baron.The key here is to use the magneto_incr function, rather than the toggle_starter function. As has been discussed here before, the toggle_starter function does not work the same way in the two sims.The C++ code I posted includes an extra icon value for the magneto_start value, in addition to off, right, left and both. It gets this from the actual starter variable (RECIP_ENGINE1_STARTER).Doug

Thanks Doug !Cheers, Rob

Doug,Thanks. What does the BIT7 flag do for you?Also, did you know you don't need the forward declarations if you format your code like this:

char engine1_gauge_name[] = GAUGE_NAME;FLOAT64 FSAPI engine1_icon_cb( PELEMENT_ICON pelement){	double mag;	lookup_var(&mag_left<1>);	lookup_var(&mag_right<1>);	mag = (mag_left<1>.var_value.n * 2.) + mag_right<1>.var_value.n;	if ( mag > 2. ) 		mag = mag + pelement->source_var.var_value.n;	return mag;}MAKE_ICON(	engine1_Icon,	OffBitmap,	NULL,	NULL,	IMAGE_USE_ERASE | IMAGE_USE_TRANSPARENCY | BIT7,	0,	11,36,	RECIP_ENGINE1_STARTER, engine1_icon_cb,	ICON_SWITCH_TYPE_STEP_TO,	5,	0,0)PELEMENT_HEADER engine1_IconList[] = {&engine1_Icon.header,NULL};MAKE_STATIC(	engine1_Static,	BackgroundBitmap,	&engine1_IconList,	NULL,	IMAGE_USE_ERASE | IMAGE_USE_TRANSPARENCY | BIT7,	0,	0,0)PELEMENT_HEADER engine1_list = &engine1_Static.header;BOOL FSAPI engine1_mouse_click_down( PPIXPOINT relative_point, FLAGS32 mouse_flags){	send_key_event(KEY_MAGNETO1_DECR,0);	return FALSE;}BOOL FSAPI engine1_mouse_click_up( PPIXPOINT relative_point, FLAGS32 mouse_flags){	send_key_event(KEY_MAGNETO1_INCR,0);	return FALSE;}MOUSE_BEGIN( engine1_mouse_rect, HELP_NONE, 0, 0 )MOUSE_TOOLTIP_TEXT_ID( TOOLTIPTEXT_ENG1_MAGNETO_SWITCH, NULL )	MOUSE_CHILD_FUNCT( 1, 1, 50, 93, CURSOR_DOWNARROW, MOUSE_LEFTSINGLE | MOUSE_DOWN_REPEAT, engine1_mouse_click_down )	MOUSE_CHILD_FUNCT( 51, 1, 50, 93, CURSOR_UPARROW,MOUSE_LEFTSINGLE | MOUSE_DOWN_REPEAT, engine1_mouse_click_up )MOUSE_ENDGAUGE_HEADER_FS700(GAUGE_W, engine1_gauge_name, &engine1_list, engine1_mouse_rect, NULL, 0, 0, 0);