Dialog Box causes program to exit
I had my program up and running fine, with my child windows running fine inside the main one. However, as soon as I called the function CreateDialog(...), such as by clicking on a menu item within my program, the program would automatically close.
Here is the basic code (ignore any functions that are irrelevant):
Code:
HWND hAboutDialog ;
HWND g_hwnd;
BOOL CALLBACK AboutDlgProc(HWND , UINT , WPARAM , LPARAM);
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM); // Windows procedure
int WINAPI WinMain(HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nShow)
{
MSG messages; // Window Messages
WNDCLASSEX wincl; // Window class
DWORD dwStyle; // Window Style
nShow = SW_SHOW;
wincl.hInstance = hThisInstance; // Window Structure - Instance
wincl.lpszClassName = szClassName; // Window Structure - Class Name
wincl.lpfnWndProc = WindowProcedure; // Window Structure - Procedure
wincl.style = CS_DBLCLKS; // Window Structure - Style (catch dblclicks)
wincl.cbSize = sizeof (WNDCLASSEX); // Window Structure - Size
wincl.hIcon = hIcon; // Load Application's Icon
wincl.hIconSm = hIcon; // Load Application's Icon
wincl.hCursor = LoadCursor (NULL, IDC_ARROW); // Default cursor
wincl.lpszMenuName = "myMenu"; // Create menu name
wincl.cbClsExtra = 0; // No extra bytes after window class
wincl.cbWndExtra = 0; // Window Instance
wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND; // Set default background
if (!RegisterClassEx (&wincl)) // If window class doesn't register -> Quit
return 0;
dwStyle = WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS | WS_CLIPCHILDREN; // Adjust window settings
g_hwnd = CreateWindowEx ( // Create the window
0,
szClassName, // Class Name
"Isis Media", // Window title
dwStyle, // Style
CW_USEDEFAULT, // Default position
CW_USEDEFAULT, // Default position
1024, // Width (px)
768, // Height (px)
NULL,
hMenu, // Load My Menu
hThisInstance, // Instance handler
NULL
);
hAboutDialog = CreateDialog(GetModuleHandle(NULL),MAKEINTRESOURCE(IDI_ABOUT),g_hwnd,AboutDlgProc);
ShowWindow (g_hwnd, nShow);
ShowWindow(hAboutDialog,SW_SHOW); // Show the window on the screen
while (GetMessage (&messages, NULL, 0, 0)) // Message loop
{
TranslateMessage(&messages); // Translate virtual-key messages into character messages
DispatchMessage(&messages); // Send message to WindowProcedure
}
return messages.wParam; // The program return-value is 0 - The value that PostQuitMessage() gave
}
/* This function is called by the Windows function DispatchMessage() */
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) /* handle the messages */
{
case WM_DESTROY:
PostQuitMessage (0); /* send a WM_QUIT to the message queue */
break;
case WM_COMMAND:
GetMenuMessage(hwnd,wParam); // Check to see if menu item was pressed
break;
default: /* for messages that we don't deal with */
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
BOOL CALLBACK AboutDlgProc(HWND hWnd, UINT message , WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_INITDIALOG:
return true;
break;
default:
return DefDlgProc (hWnd, message, wParam, lParam);
}
return false;
}
Everything is set up fine - I've created the dialog box, given it the correct identifier etc
Am I missing something stupid, such as not linking a specific library or is it something else?
(I decided against using MFC as I'm not too familiar with it!)
Thanks,
Ed
