What kind of variable should i use

This is my code...

	.386
	.model flat, stdcall
	option casemap:none

include	\masm32\include\windows.inc
include	\masm32\include\kernel32.inc
include	\masm32\include\user32.inc
includelib	\masm32\lib\kernel32.lib
includelib	\masm32\lib\user32.lib

MainDialogProc	proto :HWND, :UINT, :WPARAM, :LPARAM

	.data
Msg1Cap	        db	"MainDialogX =", 0
Msg2Cap	        db	"MainDialogY =", 0
Position	db	"Position", 0
iniString	db	"Fonts.ini", 0
X		db	"X", 0
Y		db	"Y", 0

	.data?
MainDialogX	dd	?
MainDialogY	dd	?

	.const

	.code
start:
	invoke	GetPrivateProfileInt, addr Position, addr X, 200, addr iniString
	mov	MainDialogX, eax

	invoke	GetPrivateProfileInt, addr Position, addr Y, 200, addr iniString
	mov	MainDialogY, eax

	invoke	MessageBox, NULL, addr MainDialogX, addr Msg1Cap, MB_OK


	invoke	ExitProcess, 0

end start

The variable 'MainDialogX' for some reason will not hold the value that is returned by 'GetPrivateProfileInt', what kind of variable shold it be?