汇编Win32编程问题

[nzxhust]

我要实现个下拉菜单组合框，我在资源文件中定义了个组合框，样式中选了下拉列表（在VC6.0中编辑的资源文件）
然后我在汇编ASM文件中
用invoke SendDlgItemMessage,hWnd,IDC_MONTH,CB_ADDSTRING,0,addr szText1
添加下拉列表选项可是连接后出现个问题。就是下拉列表不能显示（就是点击下拉按钮不出来），只能用鼠标滚动来调整列表选项。这是为什么？是组合框样式选择问题？还是什么原因？
补充：这里是例子资源文件定义组合框的代码：
COMBOBOX IDC_TITLETEXT, 190, 20, 105, 70, CBS_DROPDOWNLIST | WS_TABSTOP
我是用可视化编辑的，CBS_DROPDOWNLIST | WS_TABSTOP
这两个风格要选哪两个样式？在VC6.0中？

[GnailTwilight]

代码出问题了
invoke SendDlgItemMessage,hWnd,IDC_MONTH,CB_ADDSTRING,0,addr szText1

IDC_MONTH 你怎么不取资源文件里的名字 是不是你这里搞错了?

[lmxd70]

名字好像错了吧，资源定义的和引用的不一样

[nzxhust]

不是的ID 在资源文件里我也改了，不是这个问题。生成的EXE用鼠标滚动式可以调整下拉列表项的，但是下拉不行，比如我定义的是1-12月的列表项，它只在编辑框里面1月 2月的变，不能下拉成列表显示1-12个月的选项

[KingWolfOfSky]

不是很麻烦吧，等会写下看看~~

[KingWolfOfSky]

TITLE Calculator
;==================================================================
;		Author:	狼の禅
;		Date:	2009/07/24
;==================================================================
        .486
        .model flat,stdcall
        option casemap:none		 ; case sensitive
;==================================================================
			include windows.inc
			include user32.inc
			include kernel32.inc

			includelib user32.lib
;------------------------------------------------------------------
			Calculate PROTO :DWORD,:DWORD,:DWORD,:DWORD
			WinMain PROTO :DWORD, :DWORD, :DWORD, :DWORD
			WndProc PROTO :DWORD, :DWORD, :DWORD, :DWORD
;==================================================================
    .data
			hInstance	dd ?				
			hMonth		dd ?				
			dlgname		db "Calender",0		
			Month1		db "一月",0
			Month2		db "二月",0
			BOXMONTH	equ 1000
;==================================================================
    .code
start:
			invoke GetModuleHandle,NULL		
			mov hInstance,eax
			invoke WinMain,hInstance,0,0,SW_SHOWDEFAULT
			invoke ExitProcess,eax			
;==================================================================
WinMain proc hInst:DWORD, hPrevInst:DWORD, CmdLine:DWORD, CmdShow:DWORD
			LOCAL wc:WNDCLASSEX
			LOCAL msg:MSG
			LOCAL hWnd:HWND

			mov wc.cbSize,sizeof WNDCLASSEX
			mov wc.style,CS_HREDRAW or CS_VREDRAW ;or CS_BYTEALIGNWINDOW
			mov wc.lpfnWndProc,OFFSET Calculate
			mov wc.cbClsExtra,0
			mov wc.cbWndExtra,DLGWINDOWEXTRA		
			mov eax,hInst
			mov wc.hInstance,eax
			mov wc.hbrBackground,COLOR_BTNFACE+1
			mov wc.lpszMenuName,NULL
			mov wc.lpszClassName,OFFSET dlgname
			mov wc.hIcon,NULL
			invoke LoadCursor,NULL,IDC_ARROW
			mov wc.hCursor,eax
			mov wc.hIconSm,0

			invoke RegisterClassEx,ADDR wc
			invoke CreateDialogParam,hInst,ADDR dlgname,0,ADDR Calculate,0	
			mov   hWnd,eax
			invoke ShowWindow,hWnd,CmdShow		
			invoke UpdateWindow,hWnd
StartLoop:	invoke GetMessage,addr msg,0,0,0
			cmp eax,0
			je ExitLoop
			invoke TranslateMessage,ADDR msg
			invoke DispatchMessage,ADDR msg
			jmp StartLoop
ExitLoop:	mov eax,msg.wParam 
		ret

WinMain endp
;==================================================================
Calculate proc hWin:DWORD,uMsg:UINT,aParam:DWORD,bParam:DWORD
    LOCAL Ps:PAINTSTRUCT
        .if uMsg == WM_INITDIALOG
			invoke GetDlgItem,hWin,BOXMONTH
			mov hMonth,eax
			invoke SendMessage,hMonth,CB_ADDSTRING,hWin,addr Month1
			invoke SendMessage,hMonth,CB_ADDSTRING,hWin,addr Month2
        .elseif uMsg == WM_CLOSE
            invoke EndDialog,hWin,NULL
            invoke PostQuitMessage,0		
        .else
			invoke DefWindowProc,hWin,uMsg,aParam,bParam
			ret
        .endif
        xor eax,eax
        ret
Calculate endp
;==================================================================
end start

[KingWolfOfSky]

资源文件

#include "resource.h"

;################################################################################

#define BOXMONTH 1000
;################################################################################

Calender DIALOGEX 0, 0, 120, 140
STYLE WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX
CLASS "Calender"
CAPTION "Calender"
FONT 8, "MS Sans Serif"
BEGIN
   COMBOBOX	BOXMONTH,10,10,50,100,CBS_DROPDOWN | CBS_SORT | WS_VSCROLL | WS_TABSTOP
END


;##################################################################################

[nzxhust]

不好意思我知道哪里出问题了，在VC6.0中画那个组合框的时候要把下拉的那部分拖长点才能显示下拉列表