Windows menu and other common resource settings

In the current environment, programming in VC has become a habit of using MFC quickly. Many people do not know how to process resource files. I wrote this article, it is mainly to give a simple explanation of the resource file processing in VC.

1. Add icon

First, add by ID

Wndclass. hicon = loadicon (hinstance, makeintresource (idi_icon1 ));

Here, we actually convert the icon resource ID to a string pointer.

Second, add strings

Wndclass. hicon = loadicon (hinstance, text ("myicon "));

However, when using this method, you should not include the # define statement in resource. h.

Third, use the setclasslong method to set

Setclasslong (hwnd, gcl_hicon, loadicon (hinstance, makeintresource (idi_icon2 )));

This method is mainly used for dynamic setting.

2. Add string Resources

Loadstring (hinstance, ids_icon1, szappname, sizeof (szappname)/sizeof (tchar ));

ID is the ID, szappname is the pointer to the received string array, and the fourth parameter is the maximum number of characters.

Iii. Menu Resources

3.1 When you select a menu, Windows usually sends several messages to the window process:

Wm_initmenu: wparam: Main menu handle;

Lparam: 0;

Wm_menuselect: loword (wparam): selected item: menu ID or pop-up menu handle;

Hiword (wparam): select a flag;

Lparam: contains the menu handle of the selected item;

Wm_initmenupopup: wparam: pop-up menu handle;

Loword (lparam): pop-up menu index;

Hiword (lparam): The system menu is 1, and the others are 0;

Wm_command: loword (wparam): menu ID;

Hiword (wparam): 0;

Lparam: 0;

Wm_syscommand: wparam: menu ID;

Lparam: 0;

Note: If the wm_syscommand message is generated by mouse, loword (lparam) and hiword (lparam) will contain the screen coordinates of X and Y at the cursor position.

Wm_menuchar: loword (wparam): character code (ASCII or Unicode );

Hiword (wparam): select a code;

Lparam: menu handle;

The selection code is:

A. 0. No pop-up menu is displayed.

B. mf_popup. the pop-up menu is displayed.

C. mf_sysmenu: displays the system pop-up menu.

3.2 menu processing APIs

Hmenu = getmenu (hwnd );

// Obtain the menu handle

Checkmenuitem (hmenu, iselection, mf_unchecked );

Checkmenuitem (hmenu, iselection, mf_checked );

// Used to cancel or select a menu item

Enablemenuitem (hmenu, idm_timer_start, mf_grayed );

// Used for gray menu items

3.3 How to define menus

Hmenu = createmenu ();

Hmenupopup = createmenu ();

Appendmenu (hmenupopup, mf_string, idm_file_new, "& New ");

......

......

Appendmenu (hmenu, mf_popup, hmenupopup, "& file ");

3.4 floating pop-up menu

Case wm_create:
Hmenu = loadmenu (hinst, szappname );
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 );

3.5 use the System Menu

Hmenu = getsystemmenu (hwnd, false );

3.6 Other menu commands

Drawmenubar (hwnd );

// Force refresh menu

Hmenupopup = getsubmenu (hmenu, iposition );

// Obtain the handle of the pop-up menu

Icount = getmenuitemcount (hmenu );

// Obtain the top menu or the number of items in the current pop-up menu

Id = getmenuitemid (hmenupopup, iposition );

// Iposition is the position of the menu item in the pop-up menu (starting from 0)

Icharcount = getmenustring (hmenu, ID, pstring, imaxcount, IFAG );

// IFAG is mf_bycommand (where ID is the menu ID) and mf_byposition (where ID is the location index). The function returns the number of words to be copied and copies imaxcount bytes to pstring.

Iflags = getmenustate (hmenu, ID, iflag );

/// IFAG is mf_bycommand (where ID is the menu ID) and mf_byposition (where ID is the location index). The function returns a combination of the current attributes.

Destorymenu (hmenu );

// The menu handle is invalid.

3.7 Informal commands for processing menus

Setmenu (hwnd, hmenu );