Return array of chars

Question

hi, i'm from Brasil.
i make a code which use JNI and call a function in C. The function in C print all oppeneds window's names.
but i want whick the function in C return array of char with the names of the windows.
//code in java
public class WindowList {
     private native void listAllWindows();
     public static void main(String[] args) {
          WindowList wl = new WindowList();
          wl.listAllWindows();
     static{
          System.loadLibrary("WindowList");
//code in C
#include <windows.h>
#include <stdio.h>
#include "WindowList.h"
JNIEXPORT void JNICALL Java_WindowList_listAllWindows(JNIEnv *env, jobject obj)
    char vetor[50][256];      //i want return this array.
    int i = 0;
    HWND janela = NULL;
    janela = GetDesktopWindow();
    janela = GetWindow(janela, GW_CHILD);
    while(janela != NULL){
        if(IsWindowVisible(janela)){
            SendMessage(janela,WM_GETTEXT,256,(LPARAM)vetor);
printf("%s\n", vetor[i]);
i++;
janela = GetWindow(janela, GW_HWNDNEXT);
how return the array of chars?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

Answer 1

souarte wrote:
but i want whick the function in C return array of char with the names of the windows. I doubt that.
What you want is to return an array of strings.
Conceptually it is the same as if you were doing it in java.
- Get a size
- Create the array with that size
- Iterate through the array and for each index...
....-Create a string with data
....-Assign to the array.
Naturally it is going to take a lot more code to do this in C than in java.