rect 的結構還是不太清楚，有時間再看看。
#include
#define id_timer 1
lresult callback wndproc (hwnd, uint, wparam, lparam) ;
int winapi winmain (hinstance hinstance, hinstance hprevinstance,
pstr szcmdline, int icmdshow)
hwnd hwnd ;
msg msg ;
wndclass wndclass ;
wndclass.style = cs_hredraw | cs_vredraw ;
wndclass.lpfnwndproc = wndproc ;
wndclass.cbcl***tra = 0 ;
wndclass.cbwndextra = 0 ;
wndclass.hinstance = hinstance ;
wndclass.hcursor = loadcursor (null, idc_arrow) ;
wndclass.hbrbackground = (hbrush) getstockobject (white_brush) ;
wndclass.lpszmenuname = null ;
if (!registerclass (&wndclass))
messagebox ( null, text ("program requires windows nt!"),
return 0 ;
cw_usedefault, cw_usedefault,
cw_usedefault, cw_usedefault,
null, null, hinstance, null) ;
showwindow (hwnd, icmdshow) ;
updatewindow (hwnd) ;
while (getmessage (&msg, null, 0, 0))
translatemessage (&msg) ;
dispatchmessage (&msg) ;
return msg.wparam ;
lresult callback wndproc (hwnd hwnd, uint message, wparam wparam,lparam lparam)
static bool fflipflop = false ;
hbrush hbrush ;
hdc hdc ;
paintstruct ps ;
static rect rc ;
static int cxchar;
static int cychar;
switch (message)
case wm_create:
settimer(hwnd, 1,1000, null);
cxchar = loword (getdialogbaseunits ()) ;
cychar = hiword (getdialogbaseunits ()) ;
return 0;
case wm_size:
rc.left = 24 * cxchar ;
rc.top = 24 * cychar ;
rc.right = loword (lparam) ;
rc.bottom = hiword (lparam) ;
return 0;
case wm_timer:
switch (wparam)
case 1:
fflipflop = !fflipflop;
invalidaterect(hwnd,&rc,true);
break;
return 0;
case wm_paint:
hdc=beginpaint(hwnd,&ps);
getclientrect(hwnd,&rc);
hbrush = createsolidbrush(fflipflop ? rgb(255,0,0) : rgb(0,0,255));
fillrect(hdc,&rc,hbrush);
endpaint(hwnd,&ps);
deleteobject(hbrush);
return 0;
case wm_destroy:
killtimer(hwnd,1);
postquitmessage(0);
return 0;
return defwindowproc( hwnd, message, wparam, lparam);
hdc hdc;
paintstruct ps;
rect rc;
static bool fflog = false;
hbrush hbrush;
switch (message)
case wm_create:
settimer( hwnd, 1, 1000, null);
return 0;
case wm_timer:
switch(wparam)
case 1:
fflog=!fflog;
invalidaterect(hwnd,null,false);
break;
return 0;
case wm_paint:
hdc = beginpaint(hwnd,&ps);
getclientrect(hwnd,&rc);
hbrush = createsolidbrush(fflog ? rgb(0,255,0) : rgb(0,0,255));
fillrect(hdc,&rc,hbrush);
endpaint(hwnd,&ps);
deleteobject(hbrush);
return 0;
case wm_destroy:
postquitmessage(0);
killtimer(hwnd,1);
return 0;
return defwindowproc( hwnd, message, wparam, lparam);
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