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[hsd2004]

编一个程序，获取所有打开窗口的可执行程序的路径。换一个问法，如何可以避免某个程序第二次被打开执行？谢谢了。

[snowbirdfly]

使用函数FindWindow~~~
应该可以`~

[iamcaicainiao]

捕获窗口句柄

[hsd2004]

能否具体些了，谢了先。我大概找了相关的一些函数，但不知道具体如何实现。楼上的两个大侠能否指点详细些呢？

[cenlmmx]

//查询(也可以用CreateToolhelp32Snapshot())
#include <windows.h>
#include <stdio.h>
#include "psapi.h"

void PrintProcessNameAndID( DWORD processID )
{
char szProcessName[MAX_PATH] = "unknown";

// Get a handle to the process.

HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
PROCESS_VM_READ,
FALSE, processID );

// Get the process name.

if (NULL != hProcess )
{
HMODULE hMod;
DWORD cbNeeded;

if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod),
&cbNeeded) )
{
GetModuleBaseName( hProcess, hMod, szProcessName,
sizeof(szProcessName) );
}
else return;
}
else return;

// Print the process name and identifier.

printf( "%s (Process ID: %u)\n", szProcessName, processID );

CloseHandle( hProcess );
}

void main( )
{
// Get the list of process identifiers.

DWORD aProcesses[1024], cbNeeded, cProcesses;
unsigned int i;

if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
return;

// Calculate how many process identifiers were returned.

cProcesses = cbNeeded / sizeof(DWORD);

// Print the name and process identifier for each process.

for ( i = 0; i < cProcesses; i++ )
PrintProcessNameAndID( aProcesses[i] );
}

[hsd2004]

楼上的兄弟，我怎么编译出错？------ Rebuild All started: Project: www, Configuration: Debug Win32 ------

Deleting intermediate files and output files for project 'www', configuration 'Debug|Win32'.
Compiling...
gggg.cpp
Linking...
gggg.obj : error LNK2019: unresolved external symbol _GetModuleBaseNameA@16 referenced in function "void __cdecl PrintProcessNameAndID(unsigned long)" (?PrintProcessNameAndID@@YAXK@Z)
gggg.obj : error LNK2019: unresolved external symbol _EnumProcessModules@16 referenced in function "void __cdecl PrintProcessNameAndID(unsigned long)" (?PrintProcessNameAndID@@YAXK@Z)
gggg.obj : error LNK2019: unresolved external symbol _EnumProcesses@12 referenced in function _main
Debug/www.exe : fatal error LNK1120: 3 unresolved externals

Build log was saved at "file://c:\Documents and Settings\andy.huang.01\My Documents\Visual Studio Projects\www\Debug\BuildLog.htm"
www - 4 error(s), 0 warning(s)


---------------------- Done ----------------------

[iamcaicainiao]

HWND hWnd_new = NULL;
hWnd_new = FindWindos(NULL, "窗口名称");

[iamcaicainiao]

hWnd_new = FindWindow(NULL, "窗口名称");
然后你想对这个窗口干吗，就再继续干吗吧。

[hsd2004]

to iamcaicainiao(菜菜鸟）
大侠说的意思，偶不是很明白啊。可否具体点？
哪位可以告知我贴出来的编译错误是什么啊。谢谢了。

[逸学堂]

如果是自己的程序不让启动两个，
可以加上互斥变量。
// Create mutex, because there cannot be 2 instances of Updater for same application
HANDLE hMutex = CreateMutex(NULL, FALSE, "update_" + pSettings->GetAppName());
这样就可以了！

[hsd2004]

谢谢学海无涯，问题搞定。结题。