多媒体编程

开发平台：
Visual C++

about.c：源码内容
							
#include "stdafx.h"
#include "globals.h"
HWND about_create(HWND hWnd)
{
    HANDLE  hinst;
    globals.about_double_smiley_jump_pos = 20;
    globals.about_double_smiley_jump_speed = 0.1;
    hinst = GetModuleHandle(NULL);
    DialogBox(hinst, MAKEINTRESOURCE(IDD_ABOUT), NULL, (DLGPROC)about_windowproc);
    return hWnd;
}
void SetAboutText(HWND hWnd, const UINT uiStringResource)
{
    HRSRC hResource;
    HGLOBAL hResourceData;
    hResource = FindResource(NULL, MAKEINTRESOURCE(uiStringResource), "RAW");
    hResourceData = LoadResource(NULL, hResource);
    SetDlgItemText(hWnd, IDC_ABOUTTEXT, (LPCTSTR)LockResource(hResourceData));
}
LRESULT CALLBACK about_windowproc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch (msg)
    {
    case WM_INITDIALOG:
        {
            char cTitle[100];
            sprintf(cTitle, "About CoolPlayer %d", CP_BUILD_NUMBER);
            SetWindowText(hwndDlg, cTitle);
            SetTimer(hwndDlg, CPC_TIMERID_BOUNCINGICON, 20, NULL);
            SetAboutText(hwndDlg, IDR_ABOUT1);
            SendDlgItemMessage(hwndDlg, IDC_ABOUTRADIO, BM_SETCHECK, TRUE, 0);
            SetWindowPos(hwndDlg, HWND_TOPMOST,
                         0,0,0,0,
                         SWP_NOMOVE | SWP_NOSIZE);
            SetForegroundWindow(hwndDlg);
            return TRUE;
        }
    case WM_TIMER:
        {
            int     iconposition;
            iconposition =
                (int) (cos(globals.about_double_smiley_jump_pos) * 130) +
                140;
            MoveWindow(GetDlgItem(hwndDlg, IDC_ABOUTICON), 9, iconposition,
                       32, 32, TRUE);
            globals.about_double_smiley_jump_pos =
                globals.about_double_smiley_jump_pos +
                globals.about_double_smiley_jump_speed;
            if (globals.about_double_smiley_jump_pos > 5.4)
                globals.about_double_smiley_jump_pos = 0.9;
            break;
        }
    case WM_CLOSE:
        EndDialog(hwndDlg, 1);
        KillTimer(hwndDlg, CPC_TIMERID_BOUNCINGICON);
        return TRUE;
    case WM_COMMAND:
        switch (LOWORD(wParam))
        {
        case IDOK:
            EndDialog(hwndDlg, 1);
            break;
        case IDC_WEBSITE:
            ShellExecute(0, 0, "http://coolplayer.sourceforge.net", 0, 0, SW_SHOWDEFAULT);
            break;
        case IDC_KEYBOARDRADIO:
            SetAboutText(hwndDlg, IDR_KEYBOARD);
            break;
        case IDC_ABOUTRADIO:
            SetAboutText(hwndDlg, IDR_ABOUT1);
            break;
        case IDC_CHANGELOG:
            SetAboutText(hwndDlg, IDR_CHANGES);
            break;
        }
        break;
    case WM_NOTIFY:
        if (wParam == IDC_SPIN1)
        {
            NM_UPDOWN *header = (NM_UPDOWN *) lParam;
            if (header->iDelta == 1)
                globals.about_double_smiley_jump_speed = globals.about_double_smiley_jump_speed - 0.01;
            else
                globals.about_double_smiley_jump_speed = globals.about_double_smiley_jump_speed + 0.01;
            if (globals.about_double_smiley_jump_speed < 0)
                globals.about_double_smiley_jump_speed = 0;
        }
        break;
    }
    return FALSE;
}
//
//
//

						