#include?
#include?“resource.h“

const?char?g_szClassName[]?=?“myWindowClass“;
const?int?ID_TIMER?=?1;

const?int?BALL_MOVE_DELTA?=?2;

typedef?struct?_BALLINFO?
{
	int?width;
	int?height;
	int?x;
	int?y;

	int?dx;
	int?dy;
}BALLINFO;

BALLINFO?g_ballInfo;
HBITMAP?g_hbmBall?=?NULL;
HBITMAP?g_hbmMask?=?NULL;

HBITMAP?CreateBitmapMask（HBITMAP?hbmColour?COLORREF?crTransparent）
{
	HDC?hdcMem?hdcMem2;
	HBITMAP?hbmMask;
	BITMAP?bm;

	Getobject（hbmColour?sizeof（BITMAP）?&bm）;
	hbmMask?=?CreateBitmap（bm.bmWidth?bm.bmHeight?1?1?NULL）;

	hdcMem?=?CreateCompatibleDC（0）;
	hdcMem2?=?CreateCompatibleDC（0）;

	Selectobject（hdcMem?hbmColour）;
	Selectobject（hdcMem2?hbmMask）;

	SetBkColor（hdcMem?crTransparent）;

	BitBlt（hdcMem2?0?0?bm.bmWidth?bm.bmHeight?hdcMem?0?0?SRCCOPY）;

	BitBlt（hdcMem?0?0?bm.bmWidth?bm.bmHeight?hdcMem2?0?0?SRCINVERT）;

	DeleteDC（hdcMem）;
	DeleteDC（hdcMem2）;

	return?hbmMask;
}

void?DrawBall（HDC?hdc?RECT*?prc）
{
	HDC?hdcBuffer?=?CreateCompatibleDC（hdc）;
	HBITMAP?hbmBuffer?=?CreateCompatibleBitmap（hdc?prc->right?prc->bottom）;
	HBITMAP?hbmOldBuffer?=?（HBITMAP）Selectobject（hdcBuffer?hbmBuffer）;

	HDC?hdcMem?=?CreateCompatibleDC（hdc）;
	HBITMAP?hbmOld?=?（HBITMAP）Selectobject（hdcMem?g_hbmMask）;

	FillRect（hdcBuffer?prc?（HBRUSH）GetStockobject（WHITE_BRUSH））;

	BitBlt（hdcBuffer?g_ballInfo.x?g_ballInfo.y?g_ballInfo.width?g_ballInfo.height?hdcMem?0?0?SRCAND）;

	Selectobject（hdcMem?g_hbmBall）;
	BitBlt（hdcBuffer?g_ballInfo.x?g_ballInfo.y?g_ballInfo.width?g_ballInfo.height?hdcMem?0?0?SRCPAINT）;

	BitBlt（hdc?0?0?prc->right?prc->bottom?hdcBuffer?0?0?SRCCOPY）;

	Selectobject（hdcMem?hbmOld）;
	DeleteDC（hdcMem）;

	Selectobject（hdcBuffer?hbmOldBuffer）;
	DeleteDC（hdcBuffer）;
	Deleteobject（hbmBuffer）;
}

void?UpdateBall（RECT*?prc）
{
	g_ballInfo.x?+=?g_ballInfo.dx;
	g_ballInfo.y?+=?g_ballInfo.dy;

	if（g_ballInfo.x?	{
		g_ballInfo.x?=?0;
		g_ballInfo.dx?=?BALL_MOVE_DELTA;
	}
	else?if（g_ballInfo.x?+?g_ballInfo.width?>?prc->right）
	{
		g_ballInfo.x?=?prc->right?-?g_ballInfo.width;
		g_ballInfo.dx?=?-BALL_MOVE_DELTA;
	}

	if（g_ballInfo.y?	{
		g_ballInfo.y?=?0;
		g_ballInfo.dy?=?BALL_MOVE_DELTA;
	}
	else?if（g_ballInfo.y?+?g_ballInfo.height?>?prc->bottom）
	{
		g_ballInfo.y?=?prc->bottom?-?g_ballInfo.height;
		g_ballInfo.dy?=?-BALL_MOVE_DELTA;
	}
}

LRESULT?CALLBACK?WndProc（HWND?hwnd?UINT?msg?WPARAM?wParam?LPARAM?lParam）
{
	switch（msg）
	{
		case?WM_CREATE:
		{
			UINT?ret;
			BITMAP?bm;

			g_hbmBall?=?LoadBitmap（GetModuleHandle（NULL）?MAKEINTRESOURCE（IDB_BALL））;
			if（g_hbmBall?==?NULL）
				MessageBox（hwnd?“Could?not?load?IDB_BALL!“?“Error“?MB_OK?|?MB_ICONEXCLAMATION）;

			g_hbmMask?=?CreateBitmapMask（g_hbmBall?RGB（0?0?0））;
			if（g_hbmMask?==?NULL）
				MessageBox（hwnd?“Could?not?create?mask!“?“Error“?MB_OK?|?MB_ICONEXCLAMATION）;

			Getobject（g_hbmBall?sizeof（b

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2008-07-18?21:24??source\anim_one\
?????文件????????5287??2008-07-18?21:24??source\anim_one\anim_one.c
?????文件????????1748??2008-07-18?21:24??source\anim_one\anim_one.rc
?????文件????????6015??2008-07-18?21:24??source\anim_one\anim_one.vcproj
?????文件?????????630??2008-07-18?21:24??source\anim_one\ball.bmp
?????目錄???????????0??2008-07-18?21:24??source\anim_one\Release\
?????文件???????41472??2008-07-18?21:24??source\anim_one\Release\anim_one.exe
?????文件?????????457??2008-07-18?21:24??source\anim_one\resource.h
?????目錄???????????0??2008-07-18?21:24??source\app_four\
?????文件???????13196??2008-07-18?21:24??source\app_four\app_four.c
?????文件????????2581??2008-07-18?21:24??source\app_four\app_four.rc
?????文件????????6089??2008-07-18?21:24??source\app_four\app_four.vcproj
?????目錄???????????0??2008-07-18?21:24??source\app_four\Release\
?????文件???????43008??2008-07-18?21:24??source\app_four\Release\app_four.exe
?????文件?????????974??2008-07-18?21:24??source\app_four\resource.h
?????目錄???????????0??2008-07-18?21:24??source\app_one\
?????文件????????2400??2008-07-18?21:24??source\app_one\app_one.c
?????文件????????5469??2008-07-18?21:24??source\app_one\app_one.vcproj
?????目錄???????????0??2008-07-18?21:24??source\app_one\Release\
?????文件???????38912??2008-07-18?21:24??source\app_one\Release\app_one.exe
?????目錄???????????0??2008-07-18?21:24??source\app_three\
?????文件????????8344??2008-07-18?21:24??source\app_three\app_three.c
?????文件????????2061??2008-07-18?21:24??source\app_three\app_three.rc
?????文件????????6105??2008-07-18?21:24??source\app_three\app_three.vcproj
?????目錄???????????0??2008-07-18?21:24??source\app_three\Release\
?????文件???????40960??2008-07-18?21:24??source\app_three\Release\app_three.exe
?????文件?????????644??2008-07-18?21:24??source\app_three\resource.h
?????目錄???????????0??2008-07-18?21:24??source\app_two\
?????文件????????5526??2008-07-18?21:24??source\app_two\app_two.c
?????文件????????2061??2008-07-18?21:24??source\app_two\app_two.rc
?????文件????????5943??2008-07-18?21:24??source\app_two\app_two.vcproj
............此處省略85個(gè)文件信息