home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Programming Windows 95
/
Programming Windows 95.iso
/
code
/
CHAP19
/
SHOWBIT.C
< prev
next >
Wrap
C/C++ Source or Header
|
1995-12-31
|
4KB
|
123 lines
/*-----------------------------------------------------------
SHOWBIT.C -- Shows bitmaps in BITLIB dynamic link library
(c) Charles Petzold, 1996
-----------------------------------------------------------*/
#include <windows.h>
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static char szAppName[] = "ShowBit" ;
HWND hwnd ;
MSG msg ;
WNDCLASSEX wndclass ;
wndclass.cbSize = sizeof (wndclass) ;
wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;
wndclass.hIconSm = LoadIcon (NULL, IDI_APPLICATION) ;
RegisterClassEx (&wndclass) ;
hwnd = CreateWindow (szAppName, "Show Bitmaps from BITLIB (Press Key)",
WS_OVERLAPPEDWINDOW,
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 ;
}
void DrawBitmap (HDC hdc, int xStart, int yStart, HBITMAP hBitmap)
{
BITMAP bm ;
HDC hMemDC ;
POINT pt ;
hMemDC = CreateCompatibleDC (hdc) ;
SelectObject (hMemDC, hBitmap) ;
GetObject (hBitmap, sizeof (BITMAP), (PSTR) &bm) ;
pt.x = bm.bmWidth ;
pt.y = bm.bmHeight ;
BitBlt (hdc, xStart, yStart, pt.x, pt.y, hMemDC, 0, 0, SRCCOPY) ;
DeleteDC (hMemDC) ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
static HINSTANCE hLibrary ;
static int iCurrent = 1 ;
HBITMAP hBitmap ;
HDC hdc ;
PAINTSTRUCT ps ;
switch (iMsg)
{
case WM_CREATE :
if ((hLibrary = LoadLibrary ("BITLIB.DLL")) == NULL)
DestroyWindow (hwnd) ;
return 0 ;
case WM_CHAR :
if (hLibrary)
{
iCurrent ++ ;
InvalidateRect (hwnd, NULL, TRUE) ;
}
return 0 ;
case WM_PAINT :
hdc = BeginPaint (hwnd, &ps) ;
if (hLibrary)
{
if (NULL == (hBitmap = LoadBitmap (hLibrary,
MAKEINTRESOURCE (iCurrent))))
{
iCurrent = 1 ;
hBitmap = LoadBitmap (hLibrary,
MAKEINTRESOURCE (iCurrent)) ;
}
if (hBitmap)
{
DrawBitmap (hdc, 0, 0, hBitmap) ;
DeleteObject (hBitmap) ;
}
}
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DESTROY :
if (hLibrary)
FreeLibrary (hLibrary) ;
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, iMsg, wParam, lParam) ;
}