知道系统进程的ID,如何能获得该进程窗口的句柄？最好能有原程序！谢了！

[MiT]

[「已注销」]

该进程一定会有窗口吗

我糊涂了…………

@_@

[holyfire]

使用
EnumWindows
可以得到所有主窗口句柄也就是拥有窗口的进程的窗口句柄

[holyfire]

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


/*********************
EnumProc.h
*********************/
#include <windows.h>

typedef BOOL (CALLBACK *PROCENUMPROC)( DWORD, WORD, LPSTR,
LPARAM ) ;

BOOL WINAPI EnumProcs( PROCENUMPROC lpProc, LPARAM lParam ) ;

/*********************
EnumProc.c (or .cpp)
*********************/
#include "EnumProc.h"
#include <tlhelp32.h>
#include <vdmdbg.h>

typedef struct
{
DWORD dwPID ;
PROCENUMPROC lpProc ;
DWORD lParam ;
BOOL bEnd ;
} EnumInfoStruct ;

BOOL WINAPI Enum16( DWORD dwThreadId, WORD hMod16, WORD hTask16,
PSZ pszModName, PSZ pszFileName, LPARAM lpUserDefined ) ;

// The EnumProcs function takes a pointer to a callback function
// that will be called once per process in the system providing
// process EXE filename and process ID.
// Callback function definition:
// BOOL CALLBACK Proc( DWORD dw, LPCSTR lpstr, LPARAM lParam ) ;
//
// lpProc -- Address of callback routine.
//
// lParam -- A user-defined LPARAM value to be passed to
// the callback routine.
BOOL WINAPI EnumProcs( PROCENUMPROC lpProc, LPARAM lParam )
{
OSVERSIONINFO osver ;
HINSTANCE hInstLib ;
HINSTANCE hInstLib2 ;
HANDLE hSnapShot ;
PROCESSENTRY32 procentry ;
BOOL bFlag ;
LPDWORD lpdwPIDs ;
DWORD dwSize, dwSize2, dwIndex ;
HMODULE hMod ;
HANDLE hProcess ;
char szFileName[ MAX_PATH ] ;
EnumInfoStruct sInfo ;

// ToolHelp Function Pointers.
HANDLE (WINAPI *lpfCreateToolhelp32Snapshot)(DWORD,DWORD) ;
BOOL (WINAPI *lpfProcess32First)(HANDLE,LPPROCESSENTRY32) ;
BOOL (WINAPI *lpfProcess32Next)(HANDLE,LPPROCESSENTRY32) ;

// PSAPI Function Pointers.
BOOL (WINAPI *lpfEnumProcesses)( DWORD *, DWORD cb, DWORD * );
BOOL (WINAPI *lpfEnumProcessModules)( HANDLE, HMODULE *,
DWORD, LPDWORD );
DWORD (WINAPI *lpfGetModuleFileNameEx)( HANDLE, HMODULE,
LPTSTR, DWORD );

// VDMDBG Function Pointers.
INT (WINAPI *lpfVDMEnumTaskWOWEx)( DWORD,
TASKENUMPROCEX fp, LPARAM );


// Check to see if were running under Windows95 or
// Windows NT.
osver.dwOSVersionInfoSize = sizeof( osver ) ;
if( !GetVersionEx( &osver ) )
{
return FALSE ;
}

// If Windows NT:
if( osver.dwPlatformId == VER_PLATFORM_WIN32_NT )
{

// Load library and get the procedures explicitly. We do
// this so that we don't have to worry about modules using
// this code failing to load under Windows 95, because
// it can't resolve references to the PSAPI.DLL.
hInstLib = LoadLibraryA( "PSAPI.DLL" ) ;
if( hInstLib == NULL )
return FALSE ;

hInstLib2 = LoadLibraryA( "VDMDBG.DLL" ) ;
if( hInstLib2 == NULL )
return FALSE ;

// Get procedure addresses.
lpfEnumProcesses = (BOOL(WINAPI *)(DWORD *,DWORD,DWORD*))
GetProcAddress( hInstLib, "EnumProcesses" ) ;
lpfEnumProcessModules = (BOOL(WINAPI *)(HANDLE, HMODULE *,
DWORD, LPDWORD)) GetProcAddress( hInstLib,
"EnumProcessModules" ) ;
lpfGetModuleFileNameEx =(DWORD (WINAPI *)(HANDLE, HMODULE,
LPTSTR, DWORD )) GetProcAddress( hInstLib,
"GetModuleFileNameExA" ) ;
lpfVDMEnumTaskWOWEx =(INT(WINAPI *)( DWORD, TASKENUMPROCEX,
LPARAM))GetProcAddress( hInstLib2, "VDMEnumTaskWOWEx" );
if( lpfEnumProcesses == NULL ||
lpfEnumProcessModules == NULL ||
lpfGetModuleFileNameEx == NULL ||
lpfVDMEnumTaskWOWEx == NULL)
{
FreeLibrary( hInstLib ) ;
FreeLibrary( hInstLib2 ) ;
return FALSE ;
}

// Call the PSAPI function EnumProcesses to get all of the
// ProcID's currently in the system.
// NOTE: In the documentation, the third parameter of
// EnumProcesses is named cbNeeded, which implies that you
// can call the function once to find out how much space to
// allocate for a buffer and again to fill the buffer.
// This is not the case. The cbNeeded parameter returns
// the number of PIDs returned, so if your buffer size is
// zero cbNeeded returns zero.
// NOTE: The "HeapAlloc" loop here ensures that we
// actually allocate a buffer large enough for all the
// PIDs in the system.
dwSize2 = 256 * sizeof( DWORD ) ;
lpdwPIDs = NULL ;
do
{
if( lpdwPIDs )
{
HeapFree( GetProcessHeap(), 0, lpdwPIDs ) ;
dwSize2 *= 2 ;
}
lpdwPIDs = HeapAlloc( GetProcessHeap(), 0, dwSize2 );
if( lpdwPIDs == NULL )
{
FreeLibrary( hInstLib ) ;
FreeLibrary( hInstLib2 ) ;
return FALSE ;
}
if( !lpfEnumProcesses( lpdwPIDs, dwSize2, &dwSize ) )
{
HeapFree( GetProcessHeap(), 0, lpdwPIDs ) ;
FreeLibrary( hInstLib ) ;
FreeLibrary( hInstLib2 ) ;
return FALSE ;
}
}while( dwSize == dwSize2 ) ;

// How many ProcID's did we get?
dwSize /= sizeof( DWORD ) ;

// Loop through each ProcID.
for( dwIndex = 0 ; dwIndex < dwSize ; dwIndex++ )
{
szFileName[0] = 0 ;
// Open the process (if we can... security does not
// permit every process in the system).
hProcess = OpenProcess(
PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
FALSE, lpdwPIDs[ dwIndex ] ) ;
if( hProcess != NULL )
{
// Here we call EnumProcessModules to get only the
// first module in the process this is important,
// because this will be the .EXE module for which we
// will retrieve the full path name in a second.
if( lpfEnumProcessModules( hProcess, &hMod,
sizeof( hMod ), &dwSize2 ) )
{
// Get Full pathname:
if( !lpfGetModuleFileNameEx( hProcess, hMod,
szFileName, sizeof( szFileName ) ) )
{
szFileName[0] = 0 ;
}
}
CloseHandle( hProcess ) ;
}
// Regardless of OpenProcess success or failure, we
// still call the enum func with the ProcID.
if(!lpProc( lpdwPIDs[dwIndex], 0, szFileName, lParam))
break ;

// Did we just bump into an NTVDM?
if( _stricmp( szFileName+(strlen(szFileName)-9),
"NTVDM.EXE")==0)
{
// Fill in some info for the 16-bit enum proc.
sInfo.dwPID = lpdwPIDs[dwIndex] ;
sInfo.lpProc = lpProc ;
sInfo.lParam = lParam ;
sInfo.bEnd = FALSE ;
// Enum the 16-bit stuff.
lpfVDMEnumTaskWOWEx( lpdwPIDs[dwIndex],
(TASKENUMPROCEX) Enum16,
(LPARAM) &sInfo);

// Did our main enum func say quit?
if(sInfo.bEnd)
break ;
}
}

HeapFree( GetProcessHeap(), 0, lpdwPIDs ) ;
FreeLibrary( hInstLib2 ) ;

// If Windows 95:
}else if( osver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS )
{


hInstLib = LoadLibraryA( "Kernel32.DLL" ) ;
if( hInstLib == NULL )
return FALSE ;

// Get procedure addresses.
// We are linking to these functions of Kernel32
// explicitly, because otherwise a module using
// this code would fail to load under Windows NT,
// which does not have the Toolhelp32
// functions in the Kernel 32.
lpfCreateToolhelp32Snapshot=
(HANDLE(WINAPI *)(DWORD,DWORD))
GetProcAddress( hInstLib,
"CreateToolhelp32Snapshot" ) ;
lpfProcess32First=
(BOOL(WINAPI *)(HANDLE,LPPROCESSENTRY32))
GetProcAddress( hInstLib, "Process32First" ) ;
lpfProcess32Next=
(BOOL(WINAPI *)(HANDLE,LPPROCESSENTRY32))
GetProcAddress( hInstLib, "Process32Next" ) ;
if( lpfProcess32Next == NULL ||
lpfProcess32First == NULL ||
lpfCreateToolhelp32Snapshot == NULL )
{
FreeLibrary( hInstLib ) ;
return FALSE ;
}

// Get a handle to a Toolhelp snapshot of the systems
// processes.
hSnapShot = lpfCreateToolhelp32Snapshot(
TH32CS_SNAPPROCESS, 0 ) ;
if( hSnapShot == INVALID_HANDLE_VALUE )
{
FreeLibrary( hInstLib ) ;
return FALSE ;
}

// Get the first process' information.
procentry.dwSize = sizeof(PROCESSENTRY32) ;
bFlag = lpfProcess32First( hSnapShot, &procentry ) ;

// While there are processes, keep looping.
while( bFlag )
{
// Call the enum func with the filename and ProcID.
if(lpProc( procentry.th32ProcessID, 0,
procentry.szExeFile, lParam ))
{
procentry.dwSize = sizeof(PROCESSENTRY32) ;
bFlag = lpfProcess32Next( hSnapShot, &procentry );
}else
bFlag = FALSE ;
}


}else
return FALSE ;

// Free the library.
FreeLibrary( hInstLib ) ;

return TRUE ;
}

BOOL WINAPI Enum16( DWORD dwThreadId, WORD hMod16, WORD hTask16,
PSZ pszModName, PSZ pszFileName, LPARAM lpUserDefined )
{
BOOL bRet ;

EnumInfoStruct *psInfo = (EnumInfoStruct *)lpUserDefined ;

bRet = psInfo->lpProc( psInfo->dwPID, hTask16, pszFileName,
psInfo->lParam ) ;

if(!bRet)
{
psInfo->bEnd = TRUE ;
}

return !bRet;
}

[rh]

http://www.csdn.net/expert/topic/117/117299.shtm

[fb2000]

又贴出来了？再粘一次
#include "windows.h"

typedef struct tagWNDINFO
{
DWORD dwProcessId;
HWND hWnd;
} WNDINFO, *LPWNDINFO;

BOOL CALLBACK YourEnumProc(HWND hWnd, LPARAM lParam)
{
DWORD dwProcessId;
GetWindowThreadProcessId(hWnd, &dwProcessId);
LPWNDINFO pInfo = (LPWNDINFO)lParam;
if(dwProcessId == pInfo->dwProcessId)
{
pInfo->hWnd = hWnd;
return FALSE;
}
return TRUE;
}

HWND GetProcessMainWnd(DWORD dwProcessId)
{
WNDINFO wi;
wi.dwProcessId = dwProcessId;
wi.hWnd = NULL;
EnumWindows(YourEnumProc,(LPARAM)&wi);
return wi.hWnd;
}