im just started a POC for my remote desk protocol project and get in trouble when runing my code.
the screen capturing is working but only partely, when i display the image im only seeing the top right corner of the screen.

the image attached is what im seeing in the pop up window, has you can see its not full

i tried to move the window around to see if it’s just not displaying it all, playing with the functions paras and all other things for hours but still coudlnt get it to work. im suspecting that when capturing the image it doesnt get the whole screen but thats just a guess.

#include <iostream>
#include <Windows.h>


void InitializeCapture();
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

HBITMAP hBitmap = NULL;
HDC hMemoryDC = NULL;
HWND hwndMain = NULL;


int APIENTRY wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPWSTR lpCmdLine, _In_ int nShowCmd)
{
    // Register window class
    std::string str = "Sample Window Class";

    const wchar_t CLASS_NAME[] = L"Sample Window Class";

    WNDCLASS wc = {};
    wc.lpfnWndProc = WindowProc;
    wc.hInstance = hInstance;
    wc.lpszClassName = CLASS_NAME;

    RegisterClass(&wc);

    // Create window
    hwndMain = CreateWindowEx(
        0, 
        CLASS_NAME, 
        CLASS_NAME,
        WS_OVERLAPPEDWINDOW,
        0, 0, 
        GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN),
        NULL, 
        NULL, 
        hInstance, 
        NULL);

    if (hwndMain == NULL)
    {
        return 0;
    }

    // Initialize capture and display
    InitializeCapture();

    ShowWindow(hwndMain, nShowCmd);
    UpdateWindow(hwndMain);

    // Message loop
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    // Cleanup
    if (hBitmap)
        DeleteObject(hBitmap);
    if (hMemoryDC)
        DeleteDC(hMemoryDC);

    return 0;
}

void InitializeCapture()
{
    HDC hScreenDC = GetDC(NULL); // Get the screen device context

    hMemoryDC = CreateCompatibleDC(hScreenDC); // Create a memory device context
    int width = GetSystemMetrics(SM_CXSCREEN); // Screen width
    int height = GetSystemMetrics(SM_CYSCREEN); // Screen height

    hBitmap = CreateCompatibleBitmap(hScreenDC, width, height); // Create a bitmap compatible with screen DC

    HBITMAP hOldBitmap = (HBITMAP)SelectObject(hMemoryDC, hBitmap); // Select the bitmap into memory DC

    BitBlt(hMemoryDC, 0, 0, width, height, hScreenDC, 0, 0, SRCCOPY);
    SelectObject(hMemoryDC, hOldBitmap); // Restore the old bitmap
    ReleaseDC(NULL, hScreenDC); // Release the screen device context
}

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
    case WM_PAINT:
    {
        PAINTSTRUCT ps;
        HDC hdc = BeginPaint(hwnd, &ps);

        if (hBitmap)
        {
            HDC hdcMem = CreateCompatibleDC(hdc);
            HBITMAP hOldBitmap = (HBITMAP)SelectObject(hdcMem, hBitmap);

            BitBlt(hdc, 0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN), hdcMem, 0, 0, SRCCOPY);

            SelectObject(hdcMem, hOldBitmap);
            DeleteDC(hdcMem);
        }

        EndPaint(hwnd, &ps);
    }
    break;

    case WM_DESTROY:
        PostQuitMessage(0);
        break;

    default:
        return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }
    return 0;
}