C++ Calling one function from another

Question

I have a C++ Custom Action Project. I have two functions, RegProductName and GetProductName.

I call RegProductName and it has three possible outcomes. I have these in an if statement that if it is outcome 1 or outcome 2 then i call my second function GetProductName but i can't seem to get it working. Can anyone give me an example of calling one function from another please?

extern "C" UINT __stdcall RegProductName(MSIHANDLE hInstall)
{
AssertSz(FALSE, "debug here");
DebugBreak();

HRESULT hr = S_OK;
UINT er = ERROR_SUCCESS;
char szProductName[MAX_PATH];


hr = WcaInitialize(hInstall, "RegProductName");
ExitOnFailure(hr, "Failed to initialize");

WcaLog(LOGMSG_STANDARD, "Initialized.");

strcpy(szProductName, Orc_Get_Product_Name());

if(szProductName == "ORCHESTRATOR")
{
    GetProductName();
} 
else if (szProductName == "CORAL")
{
    GetProductName();
}
else 
{
    MsiSetProperty(hInstall, "PRODUCTNAME",  szProductName);
}


LExit:
er = SUCCEEDED(hr) ? ERROR_SUCCESS : ERROR_INSTALL_FAILURE;
return WcaFinalize(er);
}

The error is "Too few arguments in function call when i hover over GetProductName();

extern "C" UINT __stdcall GetProductName(MSIHANDLE hInstall)
{

HRESULT hr = S_OK;
UINT er = ERROR_SUCCESS;
DWORD Ret;
CHAR *Section = "General";
CHAR szBuffer[MAX_PATH];
CHAR szProductIniFile[MAX_PATH];
char lpszString[MAX_PATH];
int lplValue;


hr = WcaInitialize(hInstall, "GetProductName");
ExitOnFailure(hr, "Failed to initialize");

WcaLog(LOGMSG_STANDARD, "Initialized.");

TCHAR* szValueBuf = NULL;
DWORD cchValueBuf = 0;
UINT uiStat =  MsiGetProperty(hInstall, TEXT("TEMPFOLDER"), TEXT(""), &cchValueBuf);

if (ERROR_MORE_DATA == uiStat)
{
    ++cchValueBuf; 
    szValueBuf = new TCHAR[cchValueBuf];
    if (szValueBuf)
    {
        uiStat = MsiGetProperty(hInstall, TEXT("TEMPFOLDER"), szValueBuf, &cchValueBuf);
    }
}
if (ERROR_SUCCESS != uiStat)
{
    if (szValueBuf != NULL) 
        delete[] szValueBuf;
    return ERROR_INSTALL_FAILURE;
}

strcpy(szProductIniFile,szValueBuf);

Ret = strlen(szProductIniFile);
if(szProductIniFile[Ret-1] != '\\')
   strcat(szProductIniFile,"\\");

strcat(szProductIniFile, "Product.ini");

Ret = GetPrivateProfileString(Section,          // Section Title [General]
                              "PRODUCT_NAME",   // Entry
                              "Orchestrator",   // Default Value
                              szBuffer,         // Address of buffer to read to
                              MAX_PATH,         // Length of buffer
                              szProductIniFile); // .ini file name


if (strlen(szBuffer) == 0)
    strcpy(szBuffer, "ORCHESTRATOR");

if (strlen(szBuffer) >= 3 && (stricmp(szBuffer+strlen(szBuffer)-3,"DEM") == 0))
    lplValue = 1;
else
    lplValue = 0;


MsiSetProperty(hInstall, "PRODUCTNAME",  szBuffer);

LExit:
er = SUCCEEDED(hr) ? ERROR_SUCCESS : ERROR_INSTALL_FAILURE;
return WcaFinalize(er);
}

Answer 1

Your GetProductName() function takes an argument MSIHANDLE hInstall. You'll need to provide that when calling it. For instance, if you just want to call it with the same handle as RegProductName() was called with:

GetProductName(hInstall);