关于枚举窗口

EnumWindows
The EnumWindows function enumerates all top-level windows on the screen by passing the handle to each window, in turn, to an application-defined callback function. EnumWindows continues until the last top-level window is enumerated or the callback function returns FALSE.

BOOL EnumWindows(
  WNDENUMPROC lpEnumFunc,  // callback function
  LPARAM lParam            // application-defined value
);

EnumWindowsProc
The EnumWindowsProc function is an application-defined callback function used with the EnumWindows or EnumDesktopWindows function. It receives top-level window handles. The WNDENUMPROC type defines a pointer to this callback function. EnumWindowsProc is a placeholder for the application-defined function name.

BOOL CALLBACK EnumWindowsProc(
  HWND hwnd,      // handle to parent window
  LPARAM lParam   // application-defined value
);

GetWindowLong
The GetWindowLong function retrieves information about the specified window. The function also retrieves the 32-bit (long) value at the specified offset into the extra window memory.

If you are retrieving a pointer or a handle, this function has been superseded by the GetWindowLongPtr function. (Pointers and handles are 32 bits on 32-bit Windows and 64 bits on 64-bit Windows.) To write code that is compatible with both 32-bit and 64-bit versions of Windows, use GetWindowLongPtr.

LONG GetWindowLong(
  HWND hWnd,  // handle to window
  int nIndex  // offset of value to retrieve
);

 

GetWindowThreadProcessId
The GetWindowThreadProcessId function retrieves the identifier of the thread that created the specified window and, optionally, the identifier of the process that created the window.

DWORD GetWindowThreadProcessId(
  HWND hWnd,             // handle to window
  LPDWORD lpdwProcessId  // process identifier
);

 

OpenProcess
The OpenProcess function opens an existing process object.

HANDLE OpenProcess(
  DWORD dwDesiredAccess,  // access flag
  BOOL bInheritHandle,    // handle inheritance option
  DWORD dwProcessId       // process identifier
);

 

GetModuleFileName
The GetModuleFileName function retrieves the fully qualified path for the specified module.

To specify the process that contains the module, use the GetModuleFileNameEx function.

DWORD GetModuleFileName(
  HMODULE hModule,    // handle to module
  LPTSTR lpFilename,  // path buffer
  DWORD nSize         // size of buffer
);

GetClassName
The GetClassName function retrieves the name of the class to which the specified window belongs.

int GetClassName(
  HWND hWnd,           // handle to window
  LPTSTR lpClassName,  // class name
  int nMaxCount        // size of class name buffer
);

 

GetWindowText
The GetWindowText function copies the text of the specified window's title bar (if it has one) into a buffer. If the specified window is a control, the text of the control is copied. However, GetWindowText cannot retrieve the text of a control in another application.

int GetWindowText(
  HWND hWnd,        // handle to window or control
  LPTSTR lpString,  // text buffer
  int nMaxCount     // maximum number of characters to copy
);

 

实例一：

#include <iostream>#include <windows.h>BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam){HANDLE proch;DWORD proc_id;HINSTANCE hinst;char class_name[MAX_PATH], wintext[MAX_PATH], exec_name[MAX_PATH], *exec_short;hinst = (HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE);GetWindowThreadProcessId(hwnd, &proc_id);proch = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, proc_id);if(proch != NULL){if(GetModuleFileName(hinst, exec_name, MAX_PATH)){if((exec_short = strrchr(exec_name, '//')) == NULL) exec_short = exec_name;else exec_short++;}else exec_short = "<unknown>";CloseHandle(proch);}else exec_short = "<unknown>";GetClassName(hwnd, class_name, MAX_PATH);GetWindowText(hwnd, wintext, MAX_PATH);printf("Exe: %s, Class: %s, Text: %s/n", exec_short, class_name, wintext);return TRUE;}int main(int argc, char *argv[]){EnumWindows(EnumWindowsProc, 0);system("PAUSE");return EXIT_SUCCESS;}

 

实例二：

#include <windows.h>#include <stdio.h>BOOL CALLBACK EnumWindowsProc(HWND hwnd,LPARAM lParam){char chName[256];if (int ret = IsWindowVisible(hwnd)){int ret=::GetWindowText(hwnd, chName, 255);if(chName != ""){printf("%s/n", &chName);}}return true;}void main(){EnumWindows(&EnumWindowsProc, 0);}