Menus with API

[Amon Ra]

I would like to use the API to create my menus, instead of a resource file. Could anyone please tell me how to, or where i could find a tutorial? thank you very much!

[Amon Ra]

Ahhh, thanks so much no more hassle from MS VC++ resources. Btw, how do i produce an event for when the menu is clicked?(know which menu is clicked, and then have an event?)
Thanks in advance

[Amon Ra]

How come my MSVC++ always gives me this error?
Fatal Error:
"The compiler is out of heap space..."
Here is all the code:

#include <windows.h>

static char g_szClassName[] = "My Window Class";
static HINSTANCE g_hInst = NULL;

HMENU MyMenu;
HMENU SubMenu;
HWND hButton;

LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam,
LPARAM lParam)
{
switch(Message) {
case WM_CREATE:
{

MENUITEMINFO MenuInfo ;
MenuInfo.cbSize=sizeof(MenuInfo);
MenuInfo.fMask=MIIM_DATA|MIIM_ID|MIIM_TYPE|MIIM_STATE ;
MenuInfo.fType= MFT_STRING|MFT_MENUBREAK ;
MenuInfo.fState=MFS_DISABLED ;
MenuInfo.wID=152;
MenuInfo.hSubMenu=NULL;
MenuInfo.hbmpChecked=NULL;
MenuInfo.hbmpUnchecked=NULL;
MenuInfo.dwItemData=153;
MenuInfo.dwTypeData="My Menu Item";
MenuInfo.cch=sizeof("My Menu Item");

SubMenu=CreateMenu();
InsertMenuItem(SubMenu,2,true,&MenuInfo);

MenuInfo.cbSize=sizeof(MenuInfo);
MenuInfo.fMask=MIIM_DATA|MIIM_ID|MIIM_TYPE|MIIM_STATE|MIIM_SUBMENU ;
MenuInfo.fType= MFT_STRING ;
MenuInfo.fState=MFS_ENABLED ;
MenuInfo.wID=150;
MenuInfo.hSubMenu=SubMenu;
MenuInfo.hbmpChecked=NULL;
MenuInfo.hbmpUnchecked=NULL;
MenuInfo.dwItemData=151;
MenuInfo.dwTypeData="My Menu";
MenuInfo.cch=sizeof("My Menu");
MyMenu=CreateMenu();
InsertMenuItem(MyMenu,1,true,&MenuInfo);

SetMenu(hwnd,MyMenu);
}
break;
case WM_LBUTTONDOWN: //handles the message when clicked
{
char szFileName[MAX_PATH];
HINSTANCE hInstance = GetModuleHandle(NULL);

GetModuleFileName(hInstance, szFileName, MAX_PATH);
MessageBox(hwnd, szFileName, "Left Button Clicked: Program Name and Path: ",
MB_ICONINFORMATION | MB_OK);
SetWindowText(hwnd, "hello cruel world!");
}
break;
case WM_RBUTTONDOWN:
PostMessage(hwnd, WM_CLOSE,0,0); //Post a message in the message queue
break;
case WM_CLOSE: //destroy the window
DestroyMenu(SubMenu);
DestroyMenu(MyMenu);
DestroyWindow(hwnd);
break;
case WM_DESTROY: //terminates the program
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,Message,wParam,lParam);
}

return 0;
}

//main function of the program(like main() in console)
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nShowCmd)
{
WNDCLASSEX WndClass;
HWND hwnd;
MSG msg;

//set class characteristics
g_hInst = hInstance;
WndClass.cbSize = sizeof(WNDCLASSEX);
WndClass.style = NULL;
WndClass.lpfnWndProc = WndProc;
WndClass.cbClsExtra = 0;
WndClass.cbWndExtra = 0;
WndClass.hInstance = g_hInst;
WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
WndClass.lpszMenuName = NULL;
WndClass.lpszClassName = g_szClassName;
WndClass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

//check for window creation: success?
if(!RegisterClassEx(&WndClass)) {
MessageBox(0, "Window Registration Failed!","Error",
MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
return 0;
}

//finally create the window
hwnd = CreateWindowEx(WS_EX_CLIENTEDGE,
g_szClassName,
"This is my first window in C++!!",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 300, 300,
NULL, NULL, g_hInst, NULL);

//created successfully?
if(hwnd == NULL) {
MessageBox(0, "Window Creation Failed", "Error",
MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
return 0;
}

//show it
ShowWindow(hwnd, nShowCmd);
UpdateWindow(hwnd);

hButton = CreateWindowEx(NULL,"Button1","C++ Button",
WS_CHILD | WS_VISIBLE, 0, 0, 50, 50, hwnd, NULL,
g_hInst);

//message loop: message --> WindowProc
while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}

return msg.wParam;
}

Thanks for helping If you dont mind, you can also help on the previous post Thanks
Alex

[Vlatko]

Guys, just one note: Please put the code in the [code./code] tags.

[Technocrat]

I dont know why you are running out of heap space, but I did find a problem with your program. You need to fix your CreateWindowEX, your button class has to be called "Button", plus you need a lParm, at the end of your call.

So it would look like this:

hButton = CreateWindowEx(NULL,"Button","C++ Button", 
WS_CHILD | WS_VISIBLE, 0, 0, 50, 50, hwnd, NULL, 
g_hInst,0); 

Other than that your program worked fine for me.

[Bjwbell]

I think MenuInfo.wID is the item number you should intercept in th WM_COMMAND but i'm not shure so try out all the different item number's and see which one the the menu item ID.

[Amon Ra]

How do I get the message when a menu item is clicked? Meaning, how do i respond to a menu click the way i respond to a button click?

[Technocrat]

Just change the case to your wID #ers:

case WM_COMMAND:
        {
            switch(wparam)
            {
            case ID_QUIT:
                {
                    MessageBox(NULL, "The application is now quiting!", 
                               "Quiting application", MB_OK | MB_ICONINFORMATION);
                    PostQuitMessage(0);
                    return 0;
                } break;
            }
        } break; 

[Amon Ra]

Thanks a lot