Help with code

 CPU Disasm
Address   Hex dump          Command                                  Comments
00401140  |.  68 00020000   PUSH 200                                 ; /MaxCount = 512.
00401145  |.  68 D0304000   PUSH OFFSET 004030D0                     ; |String
0040114A  |.  6A 01         PUSH 1                                   ; |ItemID = 1
0040114C  |.  FF75 08       PUSH DWORD PTR SS:[ARG.1]                ; |hDialog => [ARG.1]
0040114F  |.  E8 90010000   CALL <JMP.&USER32.GetDlgItemTextA>       ; \USER32.GetDlgItemTextA
00401154  |.  68 D0304000   PUSH OFFSET 004030D0                     ; /String
00401159  |.  E8 B6010000   CALL <JMP.&KERNEL32.lstrlenA>            ; \KERNEL32.lstrlenA
0040115E  |.  8BD8          MOV EBX,EAX
00401160  |.  0BC0          OR EAX,EAX
00401162  |.  75 1C         JNE SHORT 00401180
00401164  |.  6A 00         PUSH 0                                   ; /Type = MB_OK|MB_DEFBUTTON1|MB_APPLMODAL
00401166  |.  68 04304000   PUSH OFFSET 00403004                     ; |Caption
0040116B  |.  68 16304000   PUSH OFFSET 00403016                     ; |Text = "Please enter a value for each field!"
00401170  |.  6A 00         PUSH 0                                   ; |hOwner = NULL
00401172  |.  E8 73010000   CALL <JMP.&USER32.MessageBoxA>           ; \USER32.MessageBoxA
00401177  |.  B8 00000000   MOV EAX,0
0040117C  |.  C9            LEAVE
0040117D  |.  C2 1000       RETN 10
00401180  |>  68 00020000   PUSH 200                                 ; /MaxCount = 512.
00401185  |.  68 D0324000   PUSH OFFSET 004032D0                     ; |String
0040118A  |.  6A 02         PUSH 2                                   ; |ItemID = 2
0040118C  |.  FF75 08       PUSH DWORD PTR SS:[ARG.1]                ; |hDialog => [ARG.1]
0040118F  |.  E8 50010000   CALL <JMP.&USER32.GetDlgItemTextA>       ; \USER32.GetDlgItemTextA
00401194  |.  68 D0324000   PUSH OFFSET 004032D0                     ; /String
00401199  |.  E8 76010000   CALL <JMP.&KERNEL32.lstrlenA>            ; \KERNEL32.lstrlenA