C / C++ / MFC

10-Dec-06 16:50

Hi Friends,
I need to invoke a .exe file and pass a message to that file.
Using CreateProcess,I invoked(called) the exe file, FindWindow API to
get the invoked exe and SendMessage to send the message.
The problem is, there is a time delay in CreateProcess that the
FindWindow API cannot find it,if WaitForSingleObject() function is not used.

<br />
CreateProcess("C:\\Bin\\wfp.exe",NULL,0,0,FALSE,CREATE_NEW_CONSOLE,0,0,&si,&pi);<br />
WaitForSingleObject(pi.hThread,500);//delay time 500ms		<br />
CloseHandle(pi.hProcess);<br />
<br />
hExeWnd=FindWindow(NULL,"WFP");<br />
if(hExeWnd)<br />
{<br />
   ::SendMessage(hExeWnd,WM_PLOTWAVE,0,0);<br />
   ShowWindow(hExeWnd,SW_SHOW);<br />
}<br />

The delay time 500ms may vary from machine to machine in accordance with its
performance.If I give it as INFINITE,the program stops there UNTILL the wfp.exe window is CLOSED,which is unacceptable.
So how can I make the program to wait untill the CreateProcess() completes its
task in executing the exe.

NOTE:I tried using ShellExecute API,but there too Sleep() function is needed for the time delay.

Michael Dunn10-Dec-06 17:08

Michael Dunn

10-Dec-06 17:08

Check out WaitForInputIdle()

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

poda10-Dec-06 19:52

10-Dec-06 19:52

Hey...
WaitForInputIdle() also works,if I specify the delay time as INFINITE.
Great!

Thanks a lot.
Thank you!

Naveen10-Dec-06 17:11

Naveen

10-Dec-06 17:11

if both parent application and child is urs, u can implement another technique.

Create a named event in both application. The parent application, after calling the createprocess should wait for this event. The child process may set the event to signalled state after initialized.

nave

poda10-Dec-06 19:42

10-Dec-06 19:42

Thanks friends!
I cannot use WaitForInputIdle() since it also requires the time delay.
I tried using Naveen's idea of creating events.
It worked!
In the Parent application,I wrote as

<br />
HANDLE hEvent;<br />
hEvent=CreateEvent(NULL,FALSE,FALSE,"WFP_EVENT");//Named Event<br />
		<br />
CreateProcess("C:\\Bin\\wfp.exe",NULL,0,0,FALSE,CREATE_NEW_CONSOLE,0,0,&si,&pi);	<br />
<br />
//Wait till the Event is Signaled from the called child application<br />
WaitForSingleObject(hEvent,INFINITE);	<br />
CloseHandle(pi.hProcess);<br />
CloseHandle(hEvent);<br />

In the child application(i.e the called Exe)

<br />
BOOL CWFPDlg::OnInitDialog()<br />
{<br />
...<br />
HANDLE hEvent;<br />
hEvent=CreateEvent(NULL,FALSE,FALSE,"WFP_EVENT");	<br />
if(GetLastError()==ERROR_ALREADY_EXISTS)<br />
{<br />
   hEvent=OpenEvent(EVENT_MODIFY_STATE,FALSE,"WFP_EVENT");<br />
   SetEvent(hEvent);//Signal the event<br />
}<br />
...<br />
}<br />

Naveen10-Dec-06 19:46

Naveen

10-Dec-06 19:46

poda123 wrote:
if(GetLastError()==ERROR_ALREADY_EXISTS)
{
hEvent=OpenEvent(EVENT_MODIFY_STATE,FALSE,"WFP_EVENT");

why r u openeing the event again. u already have the handle of the event?I think u can skip that line..

nave

poda10-Dec-06 21:30

10-Dec-06 21:30

That's right!
Thank you!

Windows Clipboard Format

Jeffrey Walton10-Dec-06 16:38

10-Dec-06 16:38

Hi All,

I'm having trouble finding defines for Clipboard Formats. The unknowns appear after Microsoft Word places a gif on the Clipboard. Has anyone been able come across the meaining of:

49251
49298
46289
49158
49159

Jeff

#include <windows.h>
int main(int argc, char* argv[])
{
    int count = CountClipboardFormats();
    cout << count << _T(" formats available on the clipboard:") << endl << endl;  

    if( TRUE == OpenClipboard( NULL ) )
    {
        UINT format = 0;       
        while( 0 != (format = EnumClipboardFormats( format ) ) )
        {
            switch( format )
            {
                case CF_BITMAP:
                    cout << _T("  CF_BITMAP") << endl;
                    break;

                case CF_DIB:
                    cout << _T("  CF_DIB") << endl;
                    break;

                case CF_DIBV5:
                    cout << _T("  CF_DIBV5") << endl;
                    break;

                case CF_DIF:
                    cout << _T("  CF_DIF") << endl;
                    break;

                case CF_DSPBITMAP:
                    cout << _T("  CF_DSPBITMAP") << endl;
                    break;

                case CF_DSPENHMETAFILE:
                    cout << _T("  CF_DIB") << endl;
                    break;

                case CF_DSPMETAFILEPICT:
                    cout << _T("  CF_DSPMETAFILEPICT") << endl;
                    break;

                case CF_DSPTEXT:
                    cout << _T("  CF_DSPTEXT") << endl;
                    break;

                case CF_ENHMETAFILE:
                    cout << _T("  CF_ENHMETAFILE") << endl;
                    break;

                case CF_HDROP:
                    cout << _T("  CF_HDROP") << endl;
                    break;

                case CF_LOCALE:
                    cout << _T("  CF_LOCALE") << endl;
                    break;

                case CF_METAFILEPICT:
                    cout << _T("  CF_METAFILEPICT") << endl;
                    break;

                case CF_OEMTEXT:
                    cout << _T("  CF_OEMTEXT") << endl;
                    break;

                case CF_PALETTE:
                    cout << _T("  CF_PALETTE") << endl;
                    break;

                case CF_PENDATA:
                    cout << _T("  CF_PENDATA") << endl;
                    break;

                case CF_RIFF:
                    cout << _T("  CF_RIFF") << endl;
                    break;

                case CF_SYLK:
                    cout << _T("  CF_SYLK") << endl;
                    break;

                case CF_TEXT:
                    cout << _T("  CF_TEXT") << endl;
                    break;

                case CF_WAVE:
                    cout << _T("  CF_OWNERDISPLAY") << endl;
                    break;

                case CF_TIFF:
                    cout << _T("  CF_TIFF") << endl;
                    break;

                case CF_UNICODETEXT:
                    cout << _T("  CF_UNICODETEXT") << endl;
                    break;

                case 49161:
                    cout << _T("  Data Object") << endl;
                    break;

                case 49166:
                    cout << _T("  Object Descriptor") << endl;
                    break;

                case 49272:
                    cout << _T("  Rich Text Format") << endl;
                    break;

                case 49457:
                    cout << _T("  HTML Format") << endl;
                    break;

                case 49163:
                    cout << _T("  Embed Source") << endl;
                    break;

                case 49156:
                    cout << _T("  Native") << endl;
                    break;

                case 49155:
                    cout << _T("  OwnerLink") << endl;
                    break;

                case 49167:
                    cout << _T("  Link Source Descriptor") << endl;
                    break;

                case 49154:
                    cout << _T("  ObjectLink") << endl;
                    break;

                case 49545:
                    cout << _T("  Hyperlink") << endl;
                    break;

                case 49171:
                    cout << _T("  Ole Private Data") << endl;
                    break;

                default:

                    if( format >= CF_GDIOBJFIRST && format <= CF_GDIOBJLAST )
                    {
                        cout << _T("  CF_GDIOBJFIRST + ") << format - CF_GDIOBJFIRST << endl;
                    } else

                    if( format >= CF_PRIVATEFIRST && format <= CF_PRIVATELAST )
                    {
                        cout << _T("  CF_PRIVATEFIRST + ") << format - CF_PRIVATEFIRST << endl;
                    } else

                    {
                        cout << _T("  Format: ") << format << endl;
                    }

                    break;
            }
        
        } // while( 0 != format );

        CloseClipboard( );
    }
    return 0;
}

Michael Dunn10-Dec-06 17:09

Michael Dunn

10-Dec-06 17:09

An app can put pretty much any data it wants to on the clipboard, the numbers won't always be the same from one session to the next. You can call GetClipboardFormatName() to get the string that was originally passed to RegisterClipboardFormat().

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

Jeffrey Walton10-Dec-06 17:27

10-Dec-06 17:27

Hi Mike,

Thanks. That was it.

Jeff

Format: 49161 (DataObject)
Format: 49166 (Object Descriptor)
Format: 49239 (Rich Text Format)
Format: 49297 (HTML Format)
CF_ENHMETAFILE
CF_METAFILEPICT
Format: 49345 (PNG)
Format: 49589 (GIF)
Format: 49346 (JFIF)
Format: 49592 (PNG+Office Art)
Format: 49590 (GIF+Office Art)
Format: 49591 (JFIF+Office Art)
Format: 49586 (Office Drawing Shape Format)
Format: 49594 (ActiveClipboard)
CF_DIB
CF_BITMAP
Format: 49163 (Embed Source)
Format: 49156 (Native)
Format: 49155 (OwnerLink)
Format: 49165 (Link Source)
Format: 49167 (Link Source Descriptor)
Format: 49154 (ObjectLink)
Format: 49171 (Ole Private Data)
CF_DIBV5

Jeffrey Walton10-Dec-06 17:30

10-Dec-06 17:30

In case anyone is interested in the code...

#include <windows.h>
int main(int argc, char* argv[])
{
    int count = CountClipboardFormats();
    cout << count << _T(" formats available on the clipboard:") << endl << endl;  

    if( TRUE == OpenClipboard( NULL ) )
    {
        UINT format = 0;
        
        while( 0 != (format = EnumClipboardFormats( format ) ) )
        {
            switch( format )
            {
                case CF_BITMAP:
                    cout << _T("  CF_BITMAP") << endl;
                    break;

                case CF_DIB:
                    cout << _T("  CF_DIB") << endl;
                    break;

                case CF_DIBV5:
                    cout << _T("  CF_DIBV5") << endl;
                    break;

                case CF_DIF:
                    cout << _T("  CF_DIF") << endl;
                    break;

                case CF_DSPBITMAP:
                    cout << _T("  CF_DSPBITMAP") << endl;
                    break;

                case CF_DSPENHMETAFILE:
                    cout << _T("  CF_DIB") << endl;
                    break;

                case CF_DSPMETAFILEPICT:
                    cout << _T("  CF_DSPMETAFILEPICT") << endl;
                    break;

                case CF_DSPTEXT:
                    cout << _T("  CF_DSPTEXT") << endl;
                    break;

                case CF_ENHMETAFILE:
                    cout << _T("  CF_ENHMETAFILE") << endl;
                    break;

                case CF_HDROP:
                    cout << _T("  CF_HDROP") << endl;
                    break;

                case CF_LOCALE:
                    cout << _T("  CF_LOCALE") << endl;
                    break;

                case CF_METAFILEPICT:
                    cout << _T("  CF_METAFILEPICT") << endl;
                    break;

                case CF_OEMTEXT:
                    cout << _T("  CF_OEMTEXT") << endl;
                    break;

                case CF_PALETTE:
                    cout << _T("  CF_PALETTE") << endl;
                    break;

                case CF_PENDATA:
                    cout << _T("  CF_PENDATA") << endl;
                    break;

                case CF_RIFF:
                    cout << _T("  CF_RIFF") << endl;
                    break;

                case CF_SYLK:
                    cout << _T("  CF_SYLK") << endl;
                    break;

                case CF_TEXT:
                    cout << _T("  CF_TEXT") << endl;
                    break;

                case CF_WAVE:
                    cout << _T("  CF_OWNERDISPLAY") << endl;
                    break;

                case CF_TIFF:
                    cout << _T("  CF_TIFF") << endl;
                    break;

                case CF_UNICODETEXT:
                    cout << _T("  CF_UNICODETEXT") << endl;
                    break;

                default:

                    if( format >= CF_GDIOBJFIRST && format <= CF_GDIOBJLAST )
                    {
                        cout << _T("  CF_GDIOBJFIRST + ") << format - CF_GDIOBJFIRST << endl;
                    }
                    else
                    if( format >= CF_PRIVATEFIRST && format <= CF_PRIVATELAST )
                    {
                        cout << _T("  CF_PRIVATEFIRST + ") << format - CF_PRIVATEFIRST << endl;
                    }
                    else
                    {
                        cout << _T("  Format: ") << format;

                        TCHAR FormatName[ MAX_PATH + 1 ];
                        if( 0 != GetClipboardFormatName( format, FormatName, MAX_PATH ) )
                        {
                            cout << _T(" (") << FormatName << _T(")");
                        }

                        cout << endl;
                    }

                    break;
            }
        
        } // while( 0 != format );

        CloseClipboard( );
    }

    return 0;
}

Jeffrey Walton10-Dec-06 17:50