//the header file
# define IDI_ICON 101

//Next to the default values for the new objects
//
# ifdef APSTUDIO_INVOKED
# # ifndef APSTUDIO_READONLY_SYMBOLS
# define _APS_NEXT_RESOURCE_VALUE 106
# define _APS_NEXT_COMMAND_VALUE 40001
# define _APS_NEXT_CONTROL_VALUE 1000
# define _APS_NEXT_SYMED_VALUE 101
# endif
# endif


//the source code

#include
# include "334-335. H"
//# define IDI_ICON 101
LRESULT a CALLBACK WndProc (HWND HWND, UINT message, WPARAM WPARAM, LPARAM LPARAM);
Int WINAPI WinMain (HINSTANCE HINSTANCE, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
TCHAR szAppName []=TEXT (" IconDemo ");
The HWND HWND;
MSG MSG.
WNDCLASS WNDCLASS;

Wndclass. Style=CS_HREDRAW | CS_VREDRAW;
Wndclass. LpfnWndProc=WndProc;
Wndclass. CbClsExtra=0;
Wndclass. CbWndExtra=0;
Wndclass. HInstance=hInstance;
Wndclass. HIcon=LoadIcon (hInstance, MAKEINTRESOURCE (IDI_ICON));
Wndclass. HCursor=LoadCursor (NULL, IDC_ARROW);
Wndclass. HbrBackground=(HBRUSH) GetStockObject (WHITE_BRUSH);
Wndclass. LpszMenuName=NULL;
Wndclass. LpszClassName=szAppName;

if (! RegisterClass (& amp; Wndclass))
{
MessageBox (NULL, TEXT (" This program requires Windows NT! "), szAppName, MB_ICONERROR);
return 0;
}

HWND=CreateWindow (szAppName, TEXT (" Icon Demo "),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT CW_USEDEFAULT,
CW_USEDEFAULT CW_USEDEFAULT,
NULL, NULL, hInstance, NULL);

ShowWindow (HWND, iCmdShow);
UpdateWindow (HWND);

While (GetMessage (& amp; MSG, NULL, 0, 0))
{
TranslateMessage (& amp; MSG);
DispatchMessage (& amp; MSG);
}

Return MSG. WParam;
}

LRESULT a CALLBACK WndProc (HWND HWND, UINT message, WPARAM WPARAM, LPARAM LPARAM)
{
The static HICON HICON;
Static int cxIcon cyIcon, cxClient cyClient;
HDC HDC.
HINSTANCE HINSTANCE,
PAINTSTRUCT ps;
Int x, y;

The switch (the message)
{
Case WM_CREATE message handler:
HInstance=(lParam) (LPCREATESTRUCT) - & gt; HInstance;
HIcon=LoadIcon (hInstance, MAKEINTRESOURCE (IDI_ICON));
CxIcon=GetSystemMetrics (SM_CXICON);
CyIcon=GetSystemMetrics (SM_CYICON);
return 0;
Case WM_SIZE:
CxClient=LOWORD (lParam);
CxClient=HIWORD (lParam);
return 0;
In case the WM_PAINT:
HDC=BeginPaint (HWND, & amp; Ps);
For (y=0; Y & lt; CyClient; Y +=cyIcon)
For (x=0; X & lt; CxClient; X +=cxIcon)
DrawIcon (HDC, x, y, hIcon);
EndPaint (HWND, & amp; Ps);
return 0;
Case WM_DESTROY:
The PostQuitMessage (0);
return 0;
}
Return DefWindowProc (HWND, message, wParam, lParam);
}

Error message as shown in figure,