Caption 이름이 "하나" 인 윈도우를 찾아서
해당 윈도우를 Close 하라는 메시지를 보내는 것입니다.
아래는 FindWindow에 대한 설명입니다.
모르는 함수가 있을 경우에는 해당 함수에서 F1키를 누르면 Help 파일이 나옵니다.

Syntax

HWND WINAPI FindWindow(
  __in_opt  LPCTSTR lpClassName,
  __in_opt  LPCTSTR lpWindowName
);

Parameters
lpClassName [in, optional]
Type: LPCTSTR

The class name or a class atom created by a previous call to the RegisterClass or RegisterClassEx function. The atom must be in the low-order word of lpClassName; the high-order word must be zero.
If lpClassName points to a string, it specifies the window class name. The class name can be any name registered with RegisterClass or RegisterClassEx, or any of the predefined control-class names.
If lpClassName is NULL, it finds any window whose title matches the lpWindowName parameter.

lpWindowName [in, optional]
Type: LPCTSTR

The window name (the window's title). If this parameter is NULL, all window names match.

Return value
Type:

Type: HWND

If the function succeeds, the return value is a handle to the window that has the specified class name and window name.
If the function fails, the return value is NULL. To get extended error information, call GetLastError.

Remarks
If the lpWindowName parameter is not NULL, FindWindow calls the GetWindowText function to retrieve the window name for comparison. For a description of a potential problem that can arise, see the Remarks for GetWindowText.

Examples
For an example, see Retrieving the Number of Mouse Wheel Scroll Lines.

Requirements
Minimum supported client
Windows 2000 Professional
Minimum supported server
Windows 2000 Server
Header
Winuser.h (include Windows.h)
Library
User32.lib
DLL
User32.dll
Unicode and ANSI names
FindWindowW (Unicode) and FindWindowA (ANSI)

See also
Reference
EnumWindows
FindWindowEx
GetClassName
GetWindowText
RegisterClass
RegisterClassEx
Conceptual
Windows


hanmuun 님이 쓰신 글 :
: 안녕하세요.
: 제가 질문올릴때마다 자세한 설명 너무감사합니다.
: 초보다 보니까  너무 모르는것이 많네요.^-^
: FindWindow에 대한 설명과
: 아래예제에 대한 주석좀 부탁드릴께요.
: 감사합니다.
:
: void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action)
: {
:         HWND hWnd = FindWindow(NULL, "하나");
:     if(hWnd)
:     {
:         SendMessage(hWnd,WM_CLOSE,0,0);
:     }
: }