problem with A simple modeless messagebox

hi

i am trying to create a simple messagebox
afxmessagebox will do just fine but the problem is
- it blocks my main application
- i cannot create multiples messagebox (which i need to)

so after snooping around the place, i discovered that a solution would be to create a worker thread to handle the messageboxes

here's my code

Code:

---

UINT pg_price::th_msgbox ( LPVOID lpvParam )
{
    pg_price *th_msgbox = (pg_price*)lpvParam;
       
        CDialog* pDialog;
        pDialog = new CDialog();
        pDialog->Create(IDD_MESSAGEBOX, NULL);
        pDialog->ShowWindow(SW_SHOW);
    return 0;
}

---

here's how it's called:

Code:

---

void pg_price::OnSomeEvent()
{
        AfxBeginThread ( th_msgbox, (LPVOID)this );
}

---

but the problem is that the messagebox displays for a split second and disappears. i believe it's because the worker thread returns and hence the dialog goes? or is there another reason for that??

how do i solve this problem of creating a dialog messagebox that
- doesnt block my main application
- allows my main application to continue running,processing
- multiple messageboxes

please assist:wave:

nmot sure if this is the idea you intend but here....

Code:

---

#include <windows.h>

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nCmdShow)
{
    MessageBox(NULL, "Test box", "Note", MB_OK);
    return 0;
}

---

tell me if thats not what you want *subscribes* im intrested to see how this plays out

Call pDialog->DoModal() after the call to Create().
If your dialog resource does not have WS_VISIBLE, then call ShowWindow() before DoModal() as well.

Don't bother with passing "this" to the thread if you're not going to use it ;)

gg

Quote:

---

Originally Posted by C+noob

nmot sure if this is the idea you intend but here....

Code:

---

#include <windows.h>

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nCmdShow)
{
    MessageBox(NULL, "Test box", "Note", MB_OK);
    return 0;
}

---

---

thanks for your help but i get
"illegal call of non-static member function" while compiling
and i am doing this MFC style

Quote:

---

Originally Posted by Codeplug

Call pDialog->DoModal() after the call to Create().
If your dialog resource does not have WS_VISIBLE, then call ShowWindow() before DoModal() as well.

Don't bother with passing "this" to the thread if you're not going to use it ;)

gg

---

thanks but i get an assertion error when i put the DoModal command in

i tried it in another way and it worked

Code:

---

UINT pg_price::th_msgbox ( LPVOID lpvParam )
{
    pg_price *th_msgbox = (pg_price*)lpvParam;
       
        CDialog* pDialog;
        pDialog = new CDialog();
        pDialog->MessageBox(th_msgbox->messagebox, "Time Is Up",MB_OK);
    return 0;
}

---

thanks for your great help! :)

Getting rusty on my MFC....
Use the constructor for modal dialog boxes:

Code:

---

UINT pg_price::th_msgbox(LPVOID lpvParam)
{
    CDialog dlg(IDD_MESSAGEBOX);
    dlg.ShowWindow(SW_SHOWNORMAL);
    dlg.DoModal();
    return 0;
}

---

Declare the method within the pg_price class like so:

Code:

---

static UINT th_msgbox(LPVOID lpvParam);

---

The better way of doing this is with modelss dialog boxes.

If all you want is a message box, then simply call AfxMessageBox().

gg

I think if you want to use a modeless dialog in a thread, you could try creating a user interface thread and then when the modeless dialog is destroyed post a WM_QUIT message to the thread.