ASM Community

The Example code is below:

			.if	choosenum == 5

   				(*****1*****)

 				xor ecx,ecx
 				mov eax,ecx
 				mov eax,Count  //Get the Count Value before
 				dec eax
 				dec eax
 				invoke	SetDlgItemInt,hDlgItem,IDC_one,eax,FALSE
 				xor ecx,ecx
 				mov eax,ecx	
 				mov eax,Count
 				dec eax
 				dec eax		
 				mov ecx,Size	  //Get the Size Value before
 				mul ecx
 				mov sto1,eax      //define sto1 before
 				add eax,ecx
 				add eax,ecx
 				mov sto2,eax      //define sto2 before			
 				invoke	SetDlgItemInt,hDlgItem,IDC_two,sto1,FALSE						
   				xor eax,eax
   				mov ecx,eax
   				mov eax,Count
   				dec eax
   				dec eax
   				mov ecx,100
   				mul ecx
   				mov ecx,Count
   				.if ecx
   					div ecx
   				.else
   					mov eax,0
   				.endif
   				invoke	SetDlgItemInt,hDlgItem,IDC_three,eax,FALSE	
 				invoke	SetDlgItemText,hDlgItem,IDC_four,addr szMsg

				(*****2*****)
								
   				xor ecx,ecx
   				mov eax,ecx
   				mov ecx,sto2
   				mov eax,dS      //Get the dS Value before
   				sub	eax,ecx
   				invoke  wsprintf,addr szBuffer,addr szFmt1,eax
   				invoke	SetDlgItemText,hDlgItem,IDC_five,addr szBuffer
   				xor ecx,ecx
   				mov ecx,Count
   				dec ecx
   				dec ecx
   				invoke 	wsprintf,addr szBuffer,addr szFmt2,ecx
   				invoke	SetDlgItemText,hDlgItem,IDC_six,addr szBuffer
   				invoke	SetDlgItemText,hDlgItem,IDC_seven,addr szMsg2
   				invoke	SetDlgItemText,hDlgItem,IDC_RESULT,addr szMsg3			
			.endif

This is a part of the program above:

  			xor ecx,ecx
  			xor eax,eax
  			mov ecx,Size
  			shl	ecx,1
  			mov szTemp,ecx     //define szTemp before 
  			xor ecx,ecx
  			mov eax,ecx
  			mov eax,200
  			mov ecx,Count
  			.if ecx
  				div ecx
  			.else
  				mov eax,0
  			.endif
  			invoke 	wsprintf,addr szBuffer,addr szFmt,szTemp,eax
  			invoke	SetDlgItemText,hDlgItem,IDC_box,addr szBuffer

When I put it in the position (*****1*****), it does good work, but when I put it in the position (*****2*****), it can also compile,but when I excute the program it errors(memory), Why does this happen?