Write a simple Windows Desktop Calculator program

Compilation Environment: VS2017

The main file is:

1#include"stdafx.h"2#include"WindowsProject5.h"3#include"Resource.h"4 #defineNULL 05 6 7 //callback function8 BOOL CALLBACK Mainproc (9 HWND Hwnddlg,Ten UINT umsg, One WPARAM WPARAM, A LPARAM LPARAM) - { -     //The following three behavior debug statements can be used to remove the     Chars[ the]; -wsprintf ((LPWSTR) s,l"umsg=%d,wparam=%d,lparam=%d\n", umsg, WParam, (int) lParam); - OutputDebugStringW ((LPWSTR) s); -  +     //for menu, accelerator key, click Send WM_COMMAND message -     if(Wm_command = =umsg) +     {     A         //If you click the Cancel button, close the dialog box at         if(LoWord (wParam) = =IDCANCEL) -         { - EndDialog (Hwnddlg, IDCANCEL); -             returnTRUE; -         }; -         //If you click the Calculate button, the addition is calculated and the result is obtained. in         if(LoWord (wParam) = =IDOK) -         { to             intNleft =Getdlgitemint (Hwnddlg, Idc_left, NULL, TRUE); +             intNright =Getdlgitemint (Hwnddlg, Idc_right, NULL, TRUE); -             intNresult = Nleft +Nright; the Setdlgitemint (hwnddlg,idc_result,nresult,true); *         } $     }Panax Notoginseng     returnFALSE; - } the  + //win main function A intapientry wWinMain (_in_ hinstance hinstance, the _in_opt_ hinstance hPrevInstance, + _in_ lpwstr lpCmdLine, -_in_intncmdshow) $ { $   -DialogBox (HInstance, (LPWSTR) Idd_dialog1,0, (Dlgproc) mainproc); -     return 0; the}

Resource file:

1 #define Idi_icon2                       1312#define idd_dialog1                     1333#define idc_result                      1004 4 #define Idc_right                       10055#define idc_left                        10066#define idc_static                      -1

dialog box:

Operation Result:

Write a simple Windows Desktop Calculator program