no suitable conversion function from "std::wstring" to "LPWSTR" exists in C++

By using the below code, I am getting the path "C:\ProgramFiles"

And then appending "\Test\myupdate.exe" to it.

After that I am storing this path in the "pwszTaskTrigger" structure variable like as below:

mcTskInfo.pwszTaskTrigger = strexepath;

But, When storing I am getting a warning message ("no suitable conversion function from "std::wstring" to "LPWSTR" exists"):

Below is the complete Code:

MCTASKINFO mcTskInfo = { 0 };
WCHAR szCommonFiles[MAX_PATH] = { 0 };
lRet = SHGetFolderPathW(NULL, CSIDL_PROGRAM_FILES, NULL, 0, szCommonFiles);
std::wstring strexepath = L"";
    strexepath.append(szCommonFiles);  //szCommonFiles gives the path "C:\\ProgramFiles"
    strexepath.append(ADD_MCUPDTPATH);
    mcTskInfo.pwszTaskTrigger = strexepath;

#define ADD_MCUPDTPATH          L"\\Test\\myupdate.exe"


struct MCTASKINFO
{

LPWSTR pwszTaskTrigger; 

};

Here I should not change the structure variable pwszTaskTrigger from LPWSTR to LPCWSTR. Because this file is the include file.

How can I fix this issue without changing LPWSTR to LPCWSTR?