Personal code library Objective C # desktop lyrics (functional simulation)

Using system. drawing; using system. windows. forms; using system. drawing. drawing2d; namespace windowsformsapplication2 {public partial class form1: FORM {public form1 () {initializecomponent (); this. doublebuffered = true; // enable dual-Cache for smoother display. This. size = systeminformation. workingarea. size; // The entire desktop size is used by default. In this way, all text is displayed!} Point mouse_offset; private void form_mousedown (Object sender, mouseeventargs e) {mouse_offset = E. location; // assign the coordinates of the current mouse relative to the upper left corner of the form to mouse_offset} private void form_mousemove (Object sender, mouseeventargs e) {If (E. button = mousebuttons. left) {left = control. mouseposition. x-mouse_offset.x; Top = control. mouseposition. y-mouse_offset.y;} string strtext2show = "Who else is it? "; Private void form1_paint (Object sender, painteventargs e) {graphicspath buttonpath = new graphicspath (); system. drawing. rectangle newrectangle = This. clientrectangle; string stringtext = strtext2show; // the string to be displayed. Fontfamily family = new fontfamily ("Arial"); // modify the font. Int fontstyle = (INT) fontstyle. Regular; // font-shaped, eg: bold or skewed? Int emsize = 72; // font size point origin = new point (0,700-72); // display position. Stringformat format = stringformat. genericdefault; // text layout information // use "string" to display. Buttonpath. addstring (stringtext, family, fontstyle, emsize, origin, format); this. region = new system. drawing. region (buttonpath); this. backcolor = color. red;} private void form1_click (Object sender, system. eventargs e) {strtext2show = "this is the changed text! "; This. Refresh ();}}}