Category : C++ Source Code
Archive : EXECWA.ZIP
Filename : EXECWAIT.CPP
Output of file : EXECWAIT.CPP contained in archive : EXECWA.ZIP
#include
HTASK ExecWait::hWndNotify = NULL;
HTASK ExecWait::htSpawned = NULL;
//============================================================================
// Contstructor
// Register our notify procedure, then spawn the application, then obtain its
// task handle and return to the caller.
//============================================================================
ExecWait::ExecWait(HWND hWnd, HINSTANCE hInst, LPCSTR szCmdLine)
{
lpNotifyProc = (LPFNNOTIFYCALLBACK)
MakeProcInstance((FARPROC)ExecWait::NotifyProc, hInst);
nErr = NotifyRegister(GetCurrentTask(), lpNotifyProc, NF_NORMAL);
if (!nErr)
{
nErr = EXEC_ERR_REGISTRATION;
bRegistered = FALSE;
return;
}
hWndNotify = hWnd;
bRegistered = TRUE;
nErr = WinExec(szCmdLine, SW_SHOW);
if (nErr < 32)
{
nErr = EXEC_ERR_WINEXEC - nErr;
return;
}
htSpawned = GetTaskHandle((HINSTANCE)nErr);
if (!htSpawned)
{
nErr = EXEC_ERR_NOTASK;
return;
}
nErr = 0;
}
//============================================================================
// Destructor
// Deregister us and free the proc instance, If smart callbacks were used
// Free Proc instance would not be necessary but you would need to export the
// window porcedure that the notify proc wishes to post a message to.
//============================================================================
ExecWait::~ExecWait(void)
{
if (bRegistered)
NotifyUnRegister(GetCurrentTask());
FreeProcInstance((FARPROC)lpNotifyProc);
hWndNotify = NULL;
htSpawned = NULL;
}
//============================================================================
// GetTaskHandle
// This slowly walks the task list to find which task we spawned based upon
// the instance that was returned by the WinExec call
//============================================================================
HTASK ExecWait::GetTaskHandle(HINSTANCE hInst)
{
TASKENTRY te;
BOOL bMore;
te.dwSize = sizeof(te);
bMore = TaskFirst(&te);
while (bMore)
{
if (te.hInst == hInst)
return te.hTask;
else
bMore = TaskNext(&te);
}
return NULL;
}
//============================================================================
// NotifyProc
// We are registered to get notifications when we get an exit notification
// If it is the task that we spawned then post a message to the window
//============================================================================
BOOL _export CALLBACK ExecWait::NotifyProc(WORD wId, DWORD dwData)
{
if (wId == NFY_EXITTASK && GetCurrentTask() == htSpawned)
PostMessage(hWndNotify, WM_TASK_QUIT, LOBYTE(dwData), NULL);
return FALSE;
}
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