Process32First
process32First 是一个进程获取函数,当我们利用函数CreateToolhelp32Snapshot()获得当前运行进程的快照后,我们可以利用process32First函数来获得第一个进程的句柄.其原型为(用的是vfp)
DECLARE INTEGER Process32First IN WIN32API ;
INTEGER hSnapshot,STRING @ lppe
在C语言中如下
BOOL WINAPI Process32First(
HANDLE hSnapshot,
LPPROCESSENTRY32 lppe
);
这些只是一点点,如有更好的解说,请告诉我,谢谢!neugls@126.com
vb实例
Private Type PROCESSENTRY32
dwSize As Long
cntUseage As Long
th32ProcessID As Long
th32DefaultHeapID As Long
th32ModuleID As Long
cntThreads As Long
th32ParentProcessID As Long
pcPriClassBase As Long
swFlags As Long
szExeFile As String * 1024
End Type
Private Sub demo()
Dim MySnapHandle As Long
Dim ProcessInfo As PROCESSENTRY32
MySnapHandle = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
ProcessInfo.dwSize = Len(ProcessInfo)
If Process32First(MySnapHandle, ProcessInfo) <> 0 Then
'用来判断快照MySnapHandle 成功获得进程信息
end if
end sub
===============================================================================
C/C++
Code:
PROCESSENTRY32 pe32;
// 在使用这个结构之前，先设置它的大小
pe32.dwSize = sizeof(pe32);
// 给系统内的所有进程拍一个快照
HANDLE hProcessSnap = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if(hProcessSnap == INVALID_HANDLE_VALUE)
{
printf(" CreateToolhelp32Snapshot调用失败！
");
return -1;
}
// 遍历进程快照，轮流显示每个进程的信息
BOOL bMore = ::Process32First(hProcessSnap, &pe32);
Use While loop to print it.......
::CloseHandle(hProcessSnap);
===============================================================================