[C\C++ 11 - win32] - how change the get menus system item MENUINFO structure?

Question

i have these code for change the menu system item MENUINFO structure:
MENUINFO mnInfo;
mnInfo.cbSize=sizeof(MENUINFO);
mnInfo.fMask=MIM_STYLE;
if(systmenu==false)
GetMenuInfo(GetMenu(MainHWND),&mnInfo);
else
GetMenuInfo(GetSystemMenu(MainHWND,false),&mnInfo);
mnInfo.cbSize=sizeof(MENUINFO);
mnInfo.fMask=MIM_STYLE;
mnInfo.dwStyle=MNS_NOTIFYBYPOS;
if(systmenu==false)
SetMenuInfo(GetMenu(MainHWND),&mnInfo);
else
SetMenuInfo(GetSystemMenu(MainHWND,false),&mnInfo);
MessageBox(NULL,to_string(GetLastError()).c_str(),"erro", MB_OK);
but the message box give me 87: "The parameter is incorrect."
what i'm doing wrong?
(the menu system item is added without problems. my problem is changing it for i use the WM_MENUCOMMAND message)

Answer 1

with more work and tests i resolve it ;)
else if(GetMenuState((HMENU)lParam,LOWORD(wParam),MF_BYCOMMAND)==0xFFFFFFFF && Last_Menu_ID != -1 )
i'm testing if the menu item is valid or not and test if the Last_Menu_ID is diferent than -1 ;)
heres then menu code message:
//for get the menu click event
//i'm using menu notifications
case WM_MENUCOMMAND:
MENUITEMINFO menuInfo;
menuInfo.cbSize = sizeof(MENUITEMINFO);
menuInfo.fMask=MIIM_DATA;
if(GetMenuItemInfo((HMENU)lParam,(UINT) wParam, true, &menuInfo )!=0)
Menu *mMenu = (Menu *) menuInfo.dwItemData;
if(mMenu!=NULL)
mMenu->Click();
menuhandle=NULL;
break;
//when the mouse move, enter, leave and leave the menu
case WM_MENUSELECT:
static int Last_Menu_ID = -1;
if(((HIWORD(wParam) & MF_HILITE) || (HIWORD(wParam) & MF_MOUSESELECT)) && GetMenuState((HMENU)lParam,LOWORD(wParam),MF_BYCOMMAND)!=0xFFFFFFFF)
//mouse leave the previous menu item
if(GetMenuState((HMENU)lParam,Last_Menu_ID,MF_BYCOMMAND)!=0xFFFFFFFF)
MENUITEMINFO menuInfo;
menuInfo.cbSize = sizeof(MENUITEMINFO);
menuInfo.fMask=MIIM_DATA;
GetMenuItemInfo((HMENU)lParam,Last_Menu_ID, FALSE, &menuInfo );
Menu *mMenu = (Menu *) menuInfo.dwItemData;
if (mMenu!=NULL)
mMenu->Leave();
//Mouse Enter on actual menu item
MENUITEMINFO menuInfo1;
menuInfo1.cbSize = sizeof(MENUITEMINFO);
menuInfo1.fMask=MIIM_DATA;
GetMenuItemInfo((HMENU)lParam,LOWORD(wParam), FALSE, &menuInfo1 );
Menu *mMenu = (Menu *) menuInfo1.dwItemData;
if (mMenu!=NULL)
mMenu->Enter();
Last_Menu_ID = LOWORD(wParam);
//testing if the menu item is valid and the Last_Menu_ID isn't -1
else if(GetMenuState((HMENU)lParam,LOWORD(wParam),MF_BYCOMMAND)==0xFFFFFFFF && Last_Menu_ID != -1 )
//mouse live the menu
MENUITEMINFO menuInfo;
menuInfo.cbSize = sizeof(MENUITEMINFO);
menuInfo.fMask=MIIM_DATA;
GetMenuItemInfo(menuhandle,Last_Menu_ID, FALSE, &menuInfo );
Menu *mMenu = (Menu *) menuInfo.dwItemData;
if (mMenu!=NULL)
mMenu->Leave();
Last_Menu_ID = -1;
return DefWindowProc(HandleWindow, msg, wParam, lParam);
break;
//the popup menu is open
//so i can get the menu handle
case WM_INITMENUPOPUP:
menuhandle=(HMENU)wParam;
return DefWindowProc(HandleWindow, msg, wParam, lParam);
break;
//some menus items are on system menu control
case WM_SYSCOMMAND:
//testing if the menu handle isn't null and if the menu item is valid
if (menuhandle!=NULL && GetMenuState(menuhandle,wParam,MF_BYCOMMAND)!=0xFFFFFFFF )
MENUITEMINFO menuInfo;
menuInfo.cbSize = sizeof(MENUITEMINFO);
menuInfo.fMask=MIIM_DATA;
GetMenuItemInfo(menuhandle,(UINT) wParam, FALSE, &menuInfo );
Menu *mMenu = (Menu *) menuInfo.dwItemData;
if (mMenu!=NULL)
mMenu->Click();
menuhandle=NULL;
return DefWindowProc(HandleWindow, msg, wParam, lParam);
break;
if the readers have problems with code, please tell me ;)
thanks for all Igor