/*
*/
// NAME = HELPDEMO.C
// Turbo C++ version of a Windows program to demonstrate how
// to call the Microsoft Help Engine, WINHELP.EXE. This
// program creates a window w/menu bar having two options -
// Exit and Help. Click on Help to activate the sample help file
// using WINHELP.
// Programmers: Keith E. Bugg and Jack Tackett
//
#include "helpdemo.h"
#include "context.h" // indices for help subjects
long FAR PASCAL _export DemoProc(HWND hWnd,
WORD message, WORD wParam, LONG lParam)
{
switch (message) // process messages here
{
case WM_PAINT: // message to update screen
dopaint(hWnd); // function to repaint screen
break;
case WM_KEYDOWN: // trap F1 function key
switch(wParam)
{
case VK_F1: // go to main index
WinHelp(hWnd,"HELPDEMO.HLP", HELP_CONTENTS,0);
break;
default:
break;
}
break;
case WM_COMMAND: // check for system message
switch(wParam)
{
case GEN_EXIT: // Exit from Menu bar
PostQuitMessage(0);
break;
case SC_MINIMIZE:
// system menu click on minimize
ShowWindow(hWnd,SW_SHOWMINIMIZED);
break;
case SC_MAXIMIZE:
// system menu click on maximize
ShowWindow(hWnd,SW_SHOWMAXIMIZED);
break;
case SC_RESTORE:
// system menu click on restore
ShowWindow(hWnd,SW_SHOW);
break;
//
// this case brings up the table of contents
//
case HELP_TOPICS:
WinHelp(hWnd,"HELPDEMO.HLP", HELP_CONTENTS,0);
break;
//
// next cases are for specific topics
//
case HELP_MERCURY:
WinHelp(hWnd,"HELPDEMO.HLP",HELP_CONTEXT,GO_MERCURY);
break;
case HELP_VENUS:
WinHelp(hWnd,"HELPDEMO.HLP",HELP_CONTEXT,GO_VENUS);
break;
case HELP_EARTH:
WinHelp(hWnd,"HELPDEMO.HLP",HELP_CONTEXT,GO_EARTH);
break;
case HELP_MARS:
WinHelp(hWnd,"HELPDEMO.HLP",HELP_CONTEXT,GO_MARS);
break;
default:
break;
}
break;
case WM_CLOSE: // User wants to Exit via sys menu
case WM_QUIT: // QUIT & DESTROY messages
case WM_DESTROY:
PostQuitMessage(0);
break;
default: // message of no interest to program..
return (DefWindowProc(hWnd, message,
wParam, lParam));
} // end switch on all messages
return (NULL);
} /* end MainWndProc() */
#pragma argsused // TURBO C++ pragma
/********************************************************/
int PASCAL WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance, LPSTR lpCmdLine,
int nCmdShow)
{
WNDCLASS wc;
static HWND hWnd;
MSG msg;
if (!hPrevInstance) // Other instances of app running?
{
// Fill in window class structure with parameters that
// describe the main window.
wc.style = CS_HREDRAW | CS_VREDRAW ; // Class style(s).
// Declare function to retrieve messages for this class
wc.lpfnWndProc = (long (FAR PASCAL*)())DemoProc;
wc.cbClsExtra = 0; // No per-class extra data.
wc.cbWndExtra = 0; // No per-window extra data.
wc.hInstance = hInstance; // Application that owns the class.
wc.hIcon = LoadIcon(hInstance, "HELPDEMO");
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
//
// create a cyan background
//
wc.hbrBackground = CreateSolidBrush(RGB(100,255,255));
wc.lpszMenuName = "mainmenu";
wc.lpszClassName = "HELPDEMO"; // Name used for CreateWindow()
/* Register the window class and return success/failure code. */
if(!RegisterClass(&wc))
return 0; // FAILED TO REGISTER!!
/* Create a main window for this application instance. */
hWnd = CreateWindow(
"HELPDEMO", // See RegisterClass() call.
"HELPDEMO Development", // Text for window title bar.
WS_MAXIMIZE | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_THICKFRAME
| WS_SYSMENU | WS_OVERLAPPEDWINDOW, // Window style.
0, // Default horizontal position.
0, // Default vertical position.
600, // Default width.
400, // Default height.
NULL, // Overlapped windows have no parent.
NULL, // No menu bar
hInstance, // This instance owns this window.
NULL // Pointer not needed.
);
if (!hWnd) /* If window could not be created, return "failure" */
{
MessageBeep(0);
MessageBox(hWnd,"Could not create window!","ERROR",MB_OK);
return 0;
}
/* Make the window visible; update its client area */
nCmdShow= SW_SHOWNORMAL; // Show window normal MAX size
ShowWindow(hWnd,nCmdShow ); // Show the window
UpdateWindow(hWnd); // Sends WM_PAINT message
}
/* Acquire and dispatch messages until a WM_QUIT message is received. */
while (GetMessage(&msg, // message structure
NULL, // handle of window receiving the message
NULL, // lowest message to examine
NULL)) // highest message to examine
{
TranslateMessage(&msg); // Translates virtual key codes
DispatchMessage(&msg); // Dispatches message to window
}
return (msg.wParam); // Returns the value from PostQuitMessage
} /* end WinMain() */
void dopaint(HWND hWnd) // handles any Windows PAINT messages
{
PAINTSTRUCT ps; // Paint Struct for BeginPaint call
HDC hDC;
BeginPaint(hWnd,&ps);
hDC= GetDC(hWnd); // get handle to display context
SetBkMode(hDC,TRANSPARENT);
SetTextColor(hDC,RGB(0,0,0)); /* write instructions in black */
TextOut(hDC,100,310,
"Click on Help to see a demonstration of WINHELP.EXE...",54);
EndPaint(hWnd,&ps); // END OF THE PAINT PROCEDURE
ReleaseDC(hWnd,hDC); // release the Display Context
} // end dopaint()
//
// end HELPDEMO.c
//