Outlook add-in integrating Skype

#include "Sdk.h"
#include "SkypeUtils.h"
#include "ShUtils.h"
#include "MemMgr.h"
#include "StringMgr.h"

//  MAJOR.minor string version length
static const int kMaxMmVersionLength = 32;

VOID
Skype_GetAppInfo(
    LPWSTR  *AppPath, 
    HICON   *Icon,
    HICON   *IconSm
) {
    LONG    lResult             = 0;
    HKEY    hkSkype             = NULL;
    WCHAR   SkypePath[MAX_PATH] = L"";
    DWORD   cbPath              = 0;
    DWORD   dwType              = REG_NONE;

    HICON   hIcon               = NULL;
    HICON   hIconSm             = NULL;

    __try {
        lResult = RegOpenKeyExW(HKEY_CURRENT_USER, 
                                L"Software\\Skype\\Phone", 
                                0, 
                                KEY_READ, 
                                &hkSkype
                               );
        if(lResult != ERROR_SUCCESS) {
            __leave;
        }
        cbPath = _countof(SkypePath) * sizeof(WCHAR);
        lResult = RegQueryValueExW(hkSkype, 
                                   L"SkypePath", 
                                   NULL, 
                                   &dwType, 
                                   (LPBYTE)&SkypePath[0], 
                                   &cbPath
                                  );
        if(lResult != ERROR_SUCCESS) {
            __leave;
        }
        if(dwType != REG_SZ) {
            __leave;
        }
        if(wcslen(SkypePath) == 0) {
            __leave;
        }
    }
    __finally {
        if(hkSkype != NULL) {
            RegCloseKey(hkSkype);
        }
    }

    if(SzStringLength(SkypePath) != 0) {
        PszStringDup(AppPath, 
                     SkypePath
                    );
    }

    //  get icon from Skype directly first
    if(SzStringLength(SkypePath) != 0) {
        HMODULE hSkype     = NULL;
        HICON   hIconLarge = NULL;
        HICON   hIconSmall = NULL;

        __try {
            hSkype = LoadLibraryExW(SkypePath, 
                                    NULL, 
                                    LOAD_LIBRARY_AS_DATAFILE
                                   );
            if(hSkype == NULL) {
                __leave;
            }

            hIconLarge = (HICON)LoadImageW(hSkype, 
                                           L"MAINICON", 
                                           IMAGE_ICON, 
                                           32, 
                                           32, 
                                           LR_LOADTRANSPARENT | LR_VGACOLOR
                                          );
            if(hIconLarge != NULL) {
                *Icon = hIconLarge;
            }

            hIconSmall = (HICON)LoadImageW(hSkype, 
                                           L"MAINICON", 
                                           IMAGE_ICON, 
                                           16, 
                                           16, 
                                           LR_LOADTRANSPARENT | LR_VGACOLOR
                                          );
            if(hIconSmall != NULL) {
                *IconSm = hIconSmall;
            }
        }
        __finally {
            if(hSkype != NULL) {
                FreeLibrary(hSkype);
            }
        }
    }

    //  icon
    if(*Icon == NULL || *IconSm == NULL) {
        if(ShGetIconOfApp(*AppPath, 
                          &hIcon, 
                          &hIconSm
                         )) {
            *Icon   = hIcon;
            *IconSm = hIconSm;
        }
    }

    return;
}

VOID
Skype_DeleteAvatarFile(LPVOID pvFileName) {
    if(pvFileName != NULL) {
        (VOID)DeleteFileW((LPCWSTR)pvFileName);
    }
}