Convenient message sending functions such as sendtextmessage

It was suddenly found that the message unit finally provided several convenient message sending functions:
Sendtextmessage, sendstructmessage, sendgetstructmessage, and sendgetintmessage

Although the implementation of functions is very simple, it is indeed much easier to use them to send text, structure, and integers. below is only an example of sendtextmessage:

// The example is to assign a value to edit by sending a message: Unit unit1; interfaceuses windows, messages, sysutils, variants, classes, graphics, controls, forms, dialogs, stdctrls; type tform1 = Class (tform) edit1: tedit; button1: tbutton; button2: tbutton; button3: tbutton; button4: tbutton; Procedure handle (Sender: tobject); Procedure handle (Sender: tobject); Procedure button3click (Sender: tobject); Procedure button4click (Sender: tobject); end; var form1: tform1; implementation {$ R *. DFM} // use the traditional sendmessageprocedure tform1.button1click (Sender: tobject); var STR: string; begin STR: = 'in case 1'; sendmessage (edit1.handle, wm_settext, 0, INTEGER (pchar (STR); end; // use the synchronized mprocedure tform1.button2click (Sender: tobject); var STR: string; begin STR: = 'in case 2 '; edit1.perform (wm_settext, 0, INTEGER (pchar (STR); end; // procedure tform1.button3click (Sender: tobject); var STR: string; begin STR: = 'event 3'; sendtextmessage (edit1.handle, wm_settext, 0, STR); end; // sendtextmessage can also accept the String constant procedure tform1.button4click (Sender: tobject); begin sendtextmessage (edit1.handle, wm_settext, 0, 'in case 4'); end.