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typedef enum{ sndvolNotChecked, sndvolNotPresent, sndvolPresent,} enumSndVol;
#define MAXMIXERLEN 256 // Maximum output string length
// Prototypes
STDAPI_(void) Multichannel (HWND hWnd, UINT uiMixID, DWORD dwDest, DWORD dwVolID);
BOOL OnInitDialog (HWND hDlg, HWND hwndFocus, LPARAM lParam);void OnDestroy (HWND hDlg);void OnNotify (HWND hDlg, LPNMHDR pnmh);
void InitVolume (HWND hDlg);BOOL PASCAL OnCommand (HWND hDlg, int id, HWND hwndCtl, UINT codeNotify);BOOL SndVolPresent ();void MasterVolumeConfig (HWND hWnd, UINT* puiMixID);BOOL SearchDevice (DWORD dwMixID, LPDWORD pdwDest, LPDWORD pdwVolID, LPDWORD pdwMuteID);void SearchControls(int mxid, LPMIXERLINE pml, LPDWORD pdwVolID, LPDWORD pdwMuteID, BOOL *pfFound);void DisplayVolumeControl (HWND hDlg);void UpdateVolumeSlider(HWND hWnd, DWORD dwLine);DWORD GetMaxVolume ();HRESULT GetVolume ();void SetVolume(DWORD dwVol);BOOL GetMute ();void SetMute(BOOL fMute);void FreeMixer ();void DeviceChange_Cleanup ();BOOL DeviceChange_GetHandle(DWORD dwMixerID, HANDLE *phDevice);void DeviceChange_Init(HWND hWnd, DWORD dwMixerID);void DeviceChange_Change(HWND hDlg, WPARAM wParam, LPARAM lParam);void MasterVolumeScroll(HWND hwnd, HWND hwndCtl, UINT code, int pos);void HandlePowerBroadcast (HWND hWnd, WPARAM wParam, LPARAM lParam);void SetBranding (HWND hwnd, UINT uiMixID);void ResetBranding (HWND hwnd);void FreeBrandBmp ();void CreateHotLink (BOOL fHotLink);BOOL ValidateURL ();HKEY OpenDeviceRegKey (UINT uiMixID, REGSAM sam);PTCHAR GetInterfaceName (DWORD dwMixerID);HKEY OpenDeviceBrandRegKey (UINT uiMixID);void RefreshMixCache ();
// Globals
UINT g_uiVolDevChange = 0;WNDPROC g_fnVolPSProc = NULL;HWND g_hWnd = NULL;HMIXER g_hMixer = NULL;enumSndVol g_sndvolPresent = sndvolNotChecked;BOOL g_fMasterVolume = FALSE; // True if the master volume slider is enabled
BOOL g_fMasterMute = FALSE; // True if the master mute button is enabled
BOOL g_fTrayIcon = FALSE; // Current state of tray icon button
DWORD g_dwVolID = (DWORD) -1;DWORD g_dwMuteID = (DWORD) -1;LPVOID g_pvPrevious = NULL;double* g_pdblCacheMix = NULL;BOOL g_fCacheCreated = FALSE;BOOL g_fPreviousMute = FALSE;MIXERCONTROLDETAILS g_mcd;static HDEVNOTIFY g_hDeviceEventContext = NULL;BOOL g_fChanged = FALSE;BOOL g_fInternalGenerated = FALSE;UINT g_uiMixID = 0;DWORD g_dwDest = 0;HBITMAP g_hbmBrand = NULL;WCHAR* g_szHotLinkURL = NULL;WCHAR g_szDeviceName[MAX_PATH] = { L"\0" };WCHAR g_szNoAudioDevice[MAX_PATH] = { L"\0" };MIXERLINE g_mlDst;
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