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Yes, there is a method in C++ using the Windows API that allows for searching subfolders with wildcard and additional conditions. The method is called FindFirstFileEx and it provides a way to search for files or directories using wildcards and also allows for additional filtering based on file attributes and other conditions.

To use FindFirstFileEx, you need to provide a search pattern that includes any wildcard characters (* or ?) that you want to use. For example, if you want to search for all files in a folder and its subfolders with the extension ".txt", you can use the pattern "*.txt".

You can also use the lpFindFileData parameter of the FindFirstFileEx function to filter the search results based on various file attributes, such as file size, last access time, and creation time.

Here's an example code snippet to demonstrate how to use FindFirstFileEx to search for all files in a folder and its subfolders with the extension ".txt":

#include <windows.h>
#include <iostream>

using namespace std;

void searchFiles(string path, string pattern)
{
    WIN32_FIND_DATA FindFileData;
    HANDLE hFind;

    // Add the pattern to the path to search for files
    path += "\\" + pattern;

    // Search for the first matching file in the directory
    hFind = FindFirstFileEx(path.c_str(), FindExInfoStandard, &FindFileData, FindExSearchNameMatch, NULL, 0);

    if(hFind != INVALID_HANDLE_VALUE)
    {
        do {
            // If the file is a directory, skip it
            if(FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
                continue;

            // Print the file name
            cout << FindFileData.cFileName << endl;

        } while(FindNextFile(hFind, &FindFileData));

        FindClose(hFind);
    }
}

int main()
{
    // Search for all files with the extension ".txt"
    searchFiles("C:\\Users\\Username\\Documents", "*.txt");

    return 0;
}

In this example, the searchFiles function takes two arguments: the path to the directory to search in and the search pattern to use. It then uses FindFirstFileEx and FindNextFile to iterate through the files in the directory and its subfolders, and prints the names of all files with the specified extension that are not directories.