用EnumProcesses（）之类应该加什么头文件？

[qiuanhong]

用EnumProcesses（）之类应该加什么头文件？在MSDN里也没有看到提示呀，但运行却出错：
error C2065: 'EnumProcesses' : undeclared identifier
还有OpenProcess()、EnumProcessModules（）等.

[ahao]

psapi.h

[error0]

psapi.h

[error0]

谁说MSDN里没有看最下面


EnumProcesses
The EnumProcesses function retrieves the process identifier for each process object in the system.

BOOL EnumProcesses(
DWORD *lpidProcess, // array of process identifiers
DWORD cb, // size of array
DWORD *cbNeeded // number of bytes returned
);
Parameters
lpidProcess
[out] Pointer to an array that receives the list of process identifiers.
cb
[in] Specifies the size, in bytes, of the lpidProcess array.
cbNeeded
[out] Receives the number of bytes returned in the lpidProcess array.
Return Value
If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks
It is a good idea to give EnumProcesses a large array of DWORD values, because it is hard to predict how many processes there will be at the time you call EnumProcesses. To determine how many processes were enumerated by the call to EnumProcesses, divide the resulting value in the cbNeeded parameter by sizeof(DWORD). There is no indication given when the buffer is too small to store all process identifiers.

To obtain process handles for the processes whose identifiers you have just obtained, call the OpenProcess function.

Requirements
Windows NT/2000/XP: Included in Windows NT 4.0 and later.
Windows 95/98/Me: Unsupported.
Header: Declared in Psapi.h.
Library: Use Psapi.lib.

[qiuanhong]

啊？？不会吧，会出现这种情况，我是真的没有看到哟，要不就不会这样了，我再看看

EnumProcesses
The EnumProcesses function retrieves the process identifier for each process object in the system.

BOOL EnumProcesses(
DWORD * lpidProcess, // array to receive the process identifiers
DWORD cb, // size of the array
DWORD * cbNeeded // receives the number of bytes returned
);

Parameters
lpidProcess
Pointer to an array that receives the list of process identifiers.
cb
Specifies the size, in bytes, of the lpidProcess array.
cbNeeded
Receives the number of bytes returned in the lpidProcess array.
Return Value
If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks
It is a good idea to give EnumProcesses a large array of DWORD values, because it is hard to predict how many processes there will be at the time you call EnumProcesses. To determine how many processes were enumerated by the call to EnumProcesses, divide the resulting value in the cbNeeded parameter by sizeof(DWORD).

To obtain process handles for the processes whose identifiers you have just obtained, call the OpenProcess function.

See Also
Process Status Helper Overview, PSAPI Functions, OpenProcess

没有吧，是什么原因?

对了，加了后（psapi.h、psapi.lib）
又出错：
fatal error C1083: Cannot open include file: 'psapi.h': No such file or directory
Error executing cl.exe.

[qiuanhong]

我把代码给大家参考一下（这是一位大哥的），帮我调试一下看看（如何在一个程序中得知另一个指定的程序是否运行？）：
#include "psapi.h"

//enum process to find a certain module
void CPtbView::IsAppRun(CString modulename)
{
DWORD buf[4096];
DWORD num;
TCHAR filenamebuf[_MAX_PATH+1];
HMODULE hModule;
DWORD cbReturned;
BOOL bret=EnumProcesses(buf,4095,&num);
bool bfound=false;
CString msg;

if(!bret)
{
AfxMessageBox("Error EnumProcesses");
return;
}

for(int i=0;i<(int)num;i++)
{
HANDLE hProcess =OpenProcess(PROCESS_QUERY_INFORMATION¦ PROCESS_VM_READ,false,buf[i]);
if(hProcess ==NULL)
continue;
bret=EnumProcessModules(hProcess ,&hModule, sizeof(hModule), &cbReturned );
if(bret)
{
DWORD dwret=GetModuleFileNameEx(hProcess ,hModule,filenamebuf,_MAX_PATH);
CloseHandle( hProcess ) ;
if(dwret==0)
{
msg.Format("%d",GetLastError());
AfxMessageBox(msg);
break;
}
else
{
TCHAR* pfind=_tcsstr(filenamebuf,modulename);
if(pfind)
{
bfound=true;
break;
}
}
}
}
if(bfound)
AfxMessageBox("Found it");
else
AfxMessageBox("Not found");
}

void CPtbView::OnViewCheckrun()
{
IsAppRun("notepad.exe");
}

[qiuanhong]

对了，在Win2000下运行调试

[ahao]

你的sdk太老了

[捕鲸叉]

试试动态加载该dll吧:
LoadLibrary();

//获取函数指针
typedef UINT pFunc ...
...

FreeLibrary()

[zjp009]

多看看MSDN吧， 对于API应有尽有。
比如定义：
The EnumProcesses function retrieves the process identifier for each process object in the system.

BOOL EnumProcesses(
DWORD * lpidProcess, // array to receive the process identifiers
DWORD cb, // size of the array
DWORD * cbNeeded // receives the number of bytes returned
);

另外看看See Also啊就知道包含在什么.H中了。