[Original] use win api to create top-level menus (do not use resource files)

Author: Zhu Jincan

Source: http://blog.csdn.net/clever101

 

Recently I used code: blocks for my spare time learning (vs200x is too huge for my computer ). I will compile some win APIs.Program. Code: blocks it seems that an additional resource script editor is required to write the resource script (resedit ). I don't want to use this immature external tool either. I plan to use it directly.CodeCreate a UI control. Learn how to create a top menu today. After a bit of exploration, you can understand it.

 

1. Use code: blocks to create a Win32 GUI project, which is called MyApp. This step is skipped.

 

2. Add a Resoure. h to save the resource ID (resource script is not required, resource ID is always required). How to add code:

 
# Define idm_file_new 1024 # define idm_file_open 1025
 

3. Add the code for creating a top-level menu. First, add the top-level menu handle and create a function. The Code is as follows:

 
Hmenu g_htopmenu = NULL; // top menu global variable bool createtopmenu () {g_htopmenu = createmenu (); // create a pop-up menu handle hmenu hmenupopup = createmenu (); // Add a menu item in the pop-up menu: appendmenu (hmenupopup, mf_string, idm_file_new, "& New");: appendmenu (hmenupopup, mf_string, idm_file_open, "& Open "); // Add the handle of the pop-up menu to the top menu: appendmenu (g_htopmenu, mf_popup, (uint) hmenupopup, "& file ");}
 

Second, call the following in the winmain function:

Int winapi winmain (hinstance hthisinstance, hinstance hprevinstance, lpstr lpszargument, int ncmdshow) {hwnd;/* This is the handle for our window */MSG messages; /* Here messages to the application are saved */wndclassex wincl;/* Data Structure for the windowclass * // * The window structure */wincl. hinstance = hthisinstance; wincl. lpszclassname = szclassname; wincl. lpfnwndproc = windowpr Ocedure;/* This function is called by Windows */wincl. style = cs_dblclks;/* Catch double-clicks */wincl. cbsize = sizeof (wndclassex);/* use default icon and mouse-pointer */wincl. hicon = loadicon (null, idi_application); wincl. hiconsm = loadicon (null, idi_application); wincl. hcursor = loadcursor (null, idc_arrow); wincl. lpszmenuname = NULL;/* No menu */wincl. cbclsextra = 0;/* No extra Tes after the window class */wincl. cbwndextra = 0;/* structure or the window instance * // * use Windows's default color as the background of the window */wincl. hbrbackground = (hbrush) color_background;/* register the window class, and if it fails quit the program */If (! Registerclassex (& wincl) return 0; // create the main menu createtopmenu ();/* the class is registered, let's create the Program */hwnd = createmediawex (0, /* extended possibilites for variation */szclassname,/* classname */"code: blocks template windows app",/* Title text */ws_overlappedwindow, /* default window */cw_usedefault,/* Windows decides the position */cw_usedefault,/* Where the window ends up on the screen */544, /* The programs width */375,/* and height in pixels */hwnd_desktop,/* the window is a child-window to desktop */g_htopmenu, /* No menu */hthisinstance,/* program instance handler */null/* No window creation data */); /* Make the window visible on the screen */showwindow (hwnd, ncmdshow);/* run the message loop. it will run until getmessage () returns 0 */while (getmessage (& messages, null, 0, 0 )) {/* translate virtual-key messages into character messages */translatemessage (& messages);/* send message to windowprocedure */dispatchmessage (& messages );} /* The program return-value is 0-the value that postquitmessage () gave */return messages. wparam ;}

Then add the name message response code of the menu, as follows:

Lresult callback windowprocedure (hwnd, uint message, wparam, lparam) {Switch (Message)/* handle the messages */{Case wm_destroy: postquitmessage (0 ); /* Send a wm_quit to the Message Queue */break; Case wm_command: Switch (loword (wparam) {Case idm_file_new: MessageBox (hwnd, _ T ("new file"), _ T ("prompt"), mb_ OK); break; Case idm_file_open: MessageBox (hwnd, _ T ("Open File "), _ T ("prompt"), mb_ OK); break; default: break;} break; default:/* for messages that we don't deal with */return defwindowproc (hwnd, message, wparam, lparam);} return 0 ;}
 

In this way, the Windows API application menu can be created even if the resource script file is not applicable.

 

References:

 

1. Windows API learning notes-menu

Author: clever101 posted on 22:16:21 Original article link Read: 652 comments: 3 views comments