2 | kevin
十一月 25, 2006 於 3:03 午後

可以 我先在這邊回一下
用GetExitCodeProcess Createprocess
如果程序A要等程序B 就用個While 然後裡面GetExitCodeProcess 去等B的process結束
下面這段code就是建立一個Process然後等待他結束
我貼一段sample code (google到的:P)你就瞭解了
http://goff.nu/techarticles/development/cpp/createprocess.html

int ExecuteProcess(std::string &FullPathToExe, std::string &Parameters,
int SecondsToWait)
{
int iMyCounter = 0, iReturnVal = 0;
DWORD dwExitCode;
/* - NOTE - You could check here to see if the exe even exists */
/* Add a space to the beginning of the Parameters */
if (Parameters.size() != 0 )
{
Parameters.insert(0," ");
}
/*
When using CreateProcess the first parameter needs to be
the exe itself
*/
Parameters = getExeName(FullPathToExe).append(Parameters);
/*
The second parameter to CreateProcess can not be anything
but a char!! Since we are wrapping this C function with
strings, we will create the needed memory to hold the parameters
*/
/* Dynamic Char */
char * pszParam = new char[Parameters.size() + 1];
/* Verify memory availability */
if (pszParam == 0)
{
/* Unable to obtain (allocate) memory */
return 1;
}
const char* pchrTemp = Parameters.c_str();
strcpy(pszParam, pchrTemp);
/* CreateProcess API initialization */
STARTUPINFO siStartupInfo;
PROCESS_INFORMATION piProcessInfo;
memset(&siStartupInfo, 0, sizeof(siStartupInfo));
memset(&piProcessInfo, 0, sizeof(piProcessInfo));
siStartupInfo.cb = sizeof(siStartupInfo);
/* Execute */
if (CreateProcess(FullPathToExe.c_str(), pszParam, 0, 0, false,
CREATE_DEFAULT_ERROR_MODE, 0, 0, &siStartupInfo,
&piProcessInfo) != false)
{
/*
A loop to watch the process. Dismissed with SecondsToWait
set to 0
*/
GetExitCodeProcess(piProcessInfo.hProcess, &dwExitCode);
while (dwExitCode == STILL_ACTIVE && SecondsToWait != 0)
{
GetExitCodeProcess(piProcessInfo.hProcess, &dwExitCode);
Sleep(500);
iMyCounter += 500;
if (iMyCounter > (SecondsToWait * 1000))
{
dwExitCode = 0;
}
}
}
else
{
/*
CreateProcess failed. You could also set the
return to GetLastError()
*/
iReturnVal = 2;
}
/* Release handles */
CloseHandle(piProcessInfo.hProcess);
CloseHandle(piProcessInfo.hThread);
/* Free memory */
delete[]pszParam;
pszParam = 0;
return iReturnVal;
}
/*------------------| getExeName |--------------------------------*
| Description:
| ~~~~~~~~~
| Returns the string after the last "\"
\*--------------------------------------------------------------------*/
std::string getExeName(std::string strFullPathToExe)
{
int Position = strFullPathToExe.find_last_of("\\");
strFullPathToExe = strFullPathToExe.erase(0, Position +1);
return strFullPathToExe;
}

4 | kevin
十一月 25, 2006 於 9:43 午後

其實CreateProcess的STARTUPINFO可以設定那些參數不過好像還蠻複雜的
那可以用ShellExecuteEx + WaitForSingleObject
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/shell/reference/functions/shellexecuteex.asp
你只要取得 process的handle就能給GetExitCodeProcess去檢查是不是結束了
BOOL ShellExecuteEx(
LPSHELLEXECUTEINFO lpExecInfo);
只有一個參數
typedef struct _SHELLEXECUTEINFO {
DWORD cbSize;
ULONG fMask;
HWND hwnd;
LPCTSTR lpVerb;
LPCTSTR lpFile;
LPCTSTR lpParameters;
LPCTSTR lpDirectory;
int nShow;
HINSTANCE hInstApp;
LPVOID lpIDList;
LPCTSTR lpClass;
HKEY hkeyClass;
DWORD dwHotKey;
union {
HANDLE hIcon;
HANDLE hMonitor;
} DUMMYUNIONNAME;
HANDLE hProcess;
} SHELLEXECUTEINFO, *LPSHELLEXECUTEINFO;
類似這樣來實做
SHELLEXECUTEINFO sfi;
TCHAR szFileName[128];
wcscpy(szFileName, TEXT(“\\xxx.exe”));
memset(&sfi, 0, sizeof(sfi));
sfi.cbSize = sizeof(sfi);
sfi.fMask = SEE_MASK_NOCLOSEPROCESS;
sfi.hwnd = hDlg;
sfi.lpVerb = L”open”;
sfi.lpFile = szFileName;
sfi.lpParameters = NULL;
sfi.lpDirectory = NULL;
sfi.nShow = SW_SHOWNA;
ShellExecuteEx(&sfi);
WaitForSingleObject(sfi.hProcess, INFINITE);

6 | kevin
十一月 27, 2006 於 8:53 am

是喔!!
我也沒用過BCB，我還以為BCB只是披著郎皮的羊，多一層VCL包裝而已，跟VC在寫應該沒什麼差，想不到還是不行。