求救，为什么我的LoadMenu返回NULL！

[jay0708]

#include <windows.h>
#include "resource.h"


LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

HINSTANCE hInst;
TCHAR szAppName[] = TEXT("PopMenu");

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevlnstance, PSTR szCmdShow, int iCmdShow)
{
HWND hwnd;
MSG msg;
WNDCLASS wndclass;

wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);

//如果下面的这行代码的NULL改成MAKEINTRESOURCE(POPMENU)，就出现菜单，说明POPMENU没问题

wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;

if(!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("This program requires Windows NT!"),
szAppName, MB_ICONERROR);
return 0;
}

hInst = hInstance;

hwnd = CreateWindow(szAppName, TEXT("Popup Menu Demonstration"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL);

ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);

while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static HMENU hMenu;
static int idColor[5] = {WHITE_BRUSH, LTGRAY_BRUSH, GRAY_BRUSH,
DKGRAY_BRUSH, BLACK_BRUSH};
static int iSelection = IDM_BKGND_WHITE;
POINT point;

switch(message)
{
case WM_CREATE:

//问题在这里，跟踪发现hInst非空，POPMENU也没问题（前面有个小测试），但是hMenu为NULL，错误为无法计算表达式的值。

hMenu = LoadMenu(hInst,MAKEINTRESOURCE(POPMENU));
hMenu = GetSubMenu(hMenu, 0);
return 0;

case WM_RBUTTONUP:
point.x = LOWORD(lParam);
point.y = HIWORD(lParam);
ClientToScreen(hwnd, &point);

TrackPopupMenu(hMenu, TPM_RIGHTBUTTON, point.x, point.y,
0, hwnd, NULL);
return 0;

case WM_COMMAND:
switch(LOWORD(wParam))
{
case IDm_FILE_NEW:
case IDM_FILE_OPEN:
case IDM_FILE_SAVE:
case IDM_FILE_SAVE_AS:
MessageBeep(0);
return 0;

case IDM_APP_EXIT:
SendMessage(hwnd, WM_CLOSE, 0, 0);
return 0;

case IDM_EDIT_UNDO:
case IDM_EDIT_CUT:
case IDM_EDIT_COPY:
case IDM_EDIT_PASTE:
case IDM_EDIT_CLEAR:
MessageBeep(0);
return 0;

case IDM_BKGND_WHITE:
case IDM_BKGND_LTGRAY:
case IDM_BKGND_GRAY:
case IDM_BKGND_DKGRAY:
case IDM_BKGND_BLACK:

CheckMenuItem(hMenu, iSelection, MF_UNCHECKED);
iSelection = LOWORD(wParam);
CheckMenuItem(hMenu, iSelection, MF_CHECKED);

SetClassLong(hwnd, GCL_HBRBACKGROUND, (LONG)
GetStockObject(idColor[LOWORD(wParam) - IDM_BKGND_WHITE]));

InvalidateRect(hwnd, NULL, TRUE);
return 0;

case IDM_APP_HELP:
MessageBox(hwnd, TEXT("Help not yet implemented!"),
szAppName, MB_ICONINFORMATION | MB_OK);
return 0;

case IDM_APP_ABOUT:
MessageBox(hwnd, TEXT("Menu Demonstration Program \n")
TEXT("(c)Charles Petzold, 1998"),
szAppName, MB_ICONINFORMATION | MB_OK);
return 0;

}
break;

case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}

各位大侠帮忙看一下，谢谢了

[sjdev]

MAKEINTRESOURCE(POPMENU)，这个地方，参数?

[jay0708]

引用 2 楼 sjdev 的回复:

MAKEINTRESOURCE(POPMENU)，这个地方，参数?

MAKEINTRESOURCE(POPMENU)是一个sdk内部宏，返回的是一个字符串，就是对应的那个菜单的名字，也就是szAppName。POPMENU是这个菜单的句柄。但是两种方法我都试了，就是不行啊。

[sjdev]

使用菜单资源id

[jay0708]

引用 4 楼 sjdev 的回复:

使用菜单资源id

不行，编译不通过。必须为字符串类型

[ding1188]

用GetLastError看看错误是什么

[Eleven]

MAKEINTRESOURCE(POPMENU），这里的POPMENU是Menu的ID吗？

[jay0708]

帮忙啊，谢谢各位了，急啊

[jay0708]

POPMENU是Menu的ID。