Code:
#include <windows.h>
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM); //Windows procedure
char szClassName[ ] = "Main Window"; //main window class name
char szClassName2[ ] = "Child Window";//child window class name
int WINAPI WinMain (HINSTANCE hThisInstance,
HINSTANCE hPrevInstance,
LPSTR lpszArgument,
int nFunsterStil)
{
HWND hwnd, hwnd2; //message handle for window
MSG messages; //messages saved here
WNDCLASSEX mainWindow, childWindow;//declare
//the parent window
mainWindow.hInstance = hThisInstance;
mainWindow.lpszClassName = szClassName;
mainWindow.lpfnWndProc = WindowProcedure; //function called by windows
mainWindow.style = CS_DBLCLKS; //registers double-clicks
mainWindow.cbSize = sizeof (WNDCLASSEX);
mainWindow.hIcon = LoadIcon (NULL, IDI_APPLICATION);
mainWindow.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
mainWindow.hCursor = LoadCursor (NULL, IDC_ARROW);
mainWindow.lpszMenuName = NULL;
mainWindow.cbClsExtra = 0;
mainWindow.cbWndExtra = 0;
mainWindow.hbrBackground = (HBRUSH) COLOR_BACKGROUND; //background color
if (!RegisterClassEx (&mainWindow)) //register the window class
return 0; //quit if failure
//the child window
childWindow.hInstance = hThisInstance;
childWindow.lpszClassName = szClassName2;
childWindow.lpfnWndProc = WindowProcedure;
childWindow.style = CS_DBLCLKS;
childWindow.cbSize = sizeof (WNDCLASSEX);
childWindow.hIcon = LoadIcon (NULL, IDI_APPLICATION);
childWindow.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
childWindow.hCursor = LoadCursor (NULL, IDC_ARROW);
childWindow.lpszMenuName = NULL;
childWindow.cbClsExtra = 0;
childWindow.cbWndExtra = 0;
childWindow.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
if (!RegisterClassEx (&childWindow)) //register the window class
return 0; //quit if failure
hwnd = CreateWindowEx ( //create main window
0,
szClassName, //class name
"Main Window", //title
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, //windows decides position
CW_USEDEFAULT, //windows decides position
200,
550,
HWND_DESKTOP, //child to desktop
NULL,
hThisInstance, //program instance handler
NULL
);
ShowWindow (hwnd, nFunsterStil); //show main window
while (GetMessage (&messages, NULL, 0, 0)){//run until get message returns 0
TranslateMessage(&messages);
DispatchMessage(&messages);
}
/* The program return-value is 0 - The value that PostQuitMessage() gave */
return messages.wParam;
}
//This function called by DispatchMessage();
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){
switch (message){
case WM_RBUTTONDOWN:
hwnd2 = CreateWindowEx ( //create main window
0,
szClassName, //class name
"Main Window", //title
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, //windows decides position
CW_USEDEFAULT, //windows decides position
200,
550,
hwnd, //child to parent window
NULL,
hThisInstance, //error here
NULL
);
break;
case WM_DESTROY:
PostQuitMessage (0); // send a WM_QUIT to the message queue
break;
default: //for messages that we don't deal with
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}//end WindowProcedure
