Win32 control creation and message response, win32 Control Message response

Win32 control creation and message response, win32 Control Message response

1. Control Creation

Controls are created in the same way as windows, for example:

// -------- Create a window or control ----
Hwnd = CreateWindow ("button", "myButton01", WS_VISIBLE | WS_CHILD, 80, 60, 35, 25, hWnd, (HMENU)IDB_BUTTON01, HInst,NULL);

Is the creation of a button, where hWnd is the window handle, and hInst is the application handle.

For other controls, you can change the first parameter "button" to "edit", "listbox", "static", "combobox", and so on;

If you want to create many widgets, you can use a loop and a macro combination instead:

# Define CreateCtrl (s) s. hCtrl = CreateWindow (s. sClass, s. sCaption, s. wStyle, s. x, s. y, s. w, s. h, hWnd, s. id, hInst,NULL)
# Define ctrlNum 2
// The above hInst should be set as a global variable and initialized during Window Creation
StructCtrlParam{
　　HWNDHCtrl;
　　CharSClass [8];
　　CharSCaption [16];
　　DWORDDwStyle;
　　IntX;
　　IntY;
　　IntW;
　　IntH;
　　IntId;
};
CtrlParamCtrlParams [ctrlNum] = {"button", "myButton02 ",WS_VISIBLE|WS_CHILD, 60, 35, 25 ,(HMENU)IDB_BUTTON02},
// {...}, {"Edit", "myEdit01 ",WS_VISIBLE|WS_CHILD
| ES_WANTRETURN | ES_AUTOVSCROLL | ES_MULTILINE, 80,110,100, 80 ,(HMENU)IDE_EDIT01}};

// --- WM_CREATE:
For(Int I = 0; I <CtrlNum; I ++)
{
　　CreateCtrl(CtrlParams [I]);
}

 

2. About dwStyle Parameters

The dwStyle parameter of the control has two layers. The window type starts with WS _, and other BS _, ES _, and LBS _ parameters indicate the unique type of the control.

WS_VISIBLE indicates visible. If no, the control is hidden. It can be dynamically changed in the program:

// ------ Set the window or control to be visible ---- ShowWindow (ctrlParams [0]. hCtrl,SW_SHOWNOMAL);

WS_CHILD is used to create the control and works with hWnd to determine its parent window. The position parameters x, y, width, and height are relative to the parent window;

The window or control created by WS_DISABLED is unavailable or can be dynamically changed:

// ----- SendMessage (..., WM_ENABLE,...); ------- cannot be used here ,..);-------
// ----- The result is that the control is removed in gray, but the control is still unavailable -----------
EnableWindow (ctrlparams [0]. hCtl,TRUE);

WS_GROUP is mainly used for the edit tab key function. Scope: A WS_GROUP must be in the middle of the next WS_GROUP.

WS_BORDER adds a border. If you need other borders, you can use createdomainwex. The first parameter is added, and WS_EX_CLIENTEDGE at the end of EDGE starting with WS_EX _ is added.

Other MSDN queries will not be repeated.

(1). edit Control:

ES_AUTOHSCROLL and ES_AUTOVSCROLL when the horizontal and vertical input exceeds the width or height, the slider is automatically displayed; WS_VSCORLL and WS_HSCORLL are not required;

ES_MULTILINE supports multiple rows;

ES_WANTRETURN: Press ENTER or the program outputs '\ n' to wrap the line. It must be combined with ES_MULTILINE. If it is not selected, the line feed is not accepted until the end of the line;

ES_READONLY some visual editors, also known as Lock, cannot be input on the keyboard after selection, but can be output using the WM_SETTEXT program;

// ------ TRUE indicates LOCK ---------
// ------- FALSE indicates UNLOCK ----------
SendMessage (ctrlParams [1]. hCtrl,EM_SETREADONLY,TRUE, 0 );

// -------- Obtain the edit content ----------------
SendMessage (hCtrl,WM_GETTEXT, (WPARAM) lenth, (LPARAM) buf );

// ------- Set the edit content, with a character length limit, generally 1kB ------------------
SendMessage (hCtrl,WM_SETTEXT, 0, (LPARAM) buf );

// ------ The selected characters nStart and nEnd can be equal --------
SendMessage (hCtrl,EM_GETSEL, (WPARAM) nStart, (LPARAM) nEnd );
// ------ NStart =-1 Add the character ---------- at the end of the Selection ----------
SendMessage (hCtrl,EM_REPLACESEL, 0, buf );

 

(2). listbox control:

LBS_NOTIFY can receive the message of clicking and double-clicking a list item in the main window;

LBS_MULTIPLESEL can be selected multiple times;

CaseWM_COOMAND:
Switch (HIWORD(WParam ))
{CaseLBN_DBLCLK: Break; caseLBN_SELCHANGE: Break; default: break ;}

// ----- Add an item --------
Index = SendMessage (hCtrl,LB_ADDSTRING, 0, lpName );
// ----- Delete an item --------
SendMessage (hCtrl,LB_DELETESTRING, SelIndex, 0 );

// ----- Select an item --------
SendMessage (hCtrl,LB_SETCURSEL, Index, 0 );
// ----- Obtain the selected item index --------
Index = SendMessage (hCtrl,LB_GETCURSEL, 0, 0 );
// --- Note: Use LB_SETSEL and LB_GETSEL in LBS_MULTIPLESEL

 

3.Window position

// ----- Obtain the position and size of the window or control ----
GetWindowRect (hwnd, & rect );
// ---- Set ....---
SetWindowPos (hwnd,HAND_TOPMOST, X, y, w, h,SWP_NOZORDER);