A simple func I wrote some time ago:
Code:
function DrawButton(var x, var y, var alpha, STRING *caption, STRING *functionName)
{
	var w = 187;
	var h = 40;
	static int wasPressed = 0;
	
	draw_textmode("Arial", 1, 18, alpha);
	
	if(mouse_pos.x >= x && mouse_pos.x <= x+w && mouse_pos.y >= y && mouse_pos.y <= y+h)
	{
		if(mouse_left)
		{
			draw_quad(button_bmap, vector(x, y, 0), nullvector, vector(w, h, 0), NULL, COLOR_YELLOW_DARK, alpha, 0);
			draw_text(caption, x + (w / 2) - (str_width(caption, arialMenu_font) / 2) + 2, y + (h / 2) - 6, COLOR_YELLOW_DARK);
			
			if(wasPressed == 0)
			{
				pButtonCallback = engine_getscript(_chr(functionName));
				if(ValidPointer(pButtonCallback))
				{
					pButtonCallback();
				}
			}
			
			wasPressed = 1;
		}
		else
		{
			wasPressed = 0;
			
			draw_quad(button_bmap, vector(x, y, 0), nullvector, vector(w, h, 0), NULL, COLOR_YELLOW, alpha, 0);
			draw_text(caption, x + (w / 2) - (str_width(caption, arialMenu_font) / 2), y + (h / 2) - 8, COLOR_YELLOW);
		}
	}
	else
	{
		draw_quad(button_bmap, vector(x, y, 0), nullvector, vector(w, h, 0), NULL, COLOR_WHITE, alpha, 0);
		draw_text(caption, x + (w / 2) - (str_width(caption, arialMenu_font) / 2), y + (h / 2) - 8, COLOR_WHITE);
	}
	
	draw_textmode("Arial", 0, 16, 100);
}

void ExitFunc()
{
	error("LOL");
}

DrawButton(50, 50, 100, "Quit the Game", "ExitFunc"); //HowTo


You just need to make a new variable and store mouse_left, and wait till its not pressed anymore, then execute the event laugh

Last edited by Ch40zzC0d3r; 11/17/12 13:32.