Someone

//edx contains the number of chars in the imputted name
//edi contains the inputted name

mov ebx,4h
xor eax,eax
mov esi,186A0h
mov ecx,edx
xor edx,edx

SERIAL_ROUTINE:

movsx eax,byte ptr [edi+edx]
imul eax,ebx
lea esi,[esi+eax+2Bh]
add edx,1
add ebx,4
cmp edx,ecx
jl SERIAL_ROUTINE
mov ebx,esi

//ebx contains the final, real, serial

converted:

int nLen = GetWindowTextLength(GetDlgItem(hWnd, IDC_NAME))+1;								
LPSTR lpszName = new CHAR[nLen];
GetDlgItemText(hWnd, IDC_NAME, lpszName, nLen);
nLen--;
int nPos = 0, nSum = 0;
while(nPos < nLen) nSum += (lpszName[nPos++] * (4 * (nPos + 1))) + 0x186CB // (0x186A0 + 0x2B)