Transparent Overlay For Kill-Counter Lagging Game - c++

Question

So basically I have this program that makes a transparent overlay for a game so I can make a kill counter. However, when I click on the game with the overlay on, nothing happens. I managed to make it so when you click on it then it sends a message to the game telling it to shoot, however, when I tried the same for moving my characters head it was just laggy and snappy. When I would move my head quickly, my cursor would also fly out of the game window. How can I fix this so when I play the game it would be like its not even there.
I have tried sending the message and setting the window active AND using setcapture. However, none of these worked. I have tried looking at other places but they didn't work either.
/* This is my while(true) loop: */
while (TRUE)
{
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
if (msg.message == WM_QUIT)
{
break;
}
TranslateMessage(&msg); // translates virtual-key messages into character messages
DispatchMessage(&msg); // dispatches a message to WindowProc
}
if (gameProcId == 0)
{
gameProcId = GetProcId(L"ac_client.exe");
}
if (gameWnd == NULL)
{
gameWnd = FindWindow(NULL, L"AssaultCube");
}
if ((gameProc == NULL) && (gameProcId != 0))
{
gameProc = OpenProcess(PROCESS_VM_READ, false, gameProcId); // opens an existing local process and returns a handle to it
}
if (gameProc != NULL)
{
if ((!init_ok) || ((loops % 20) == 0))
{
RECT client_rect;
#pragma warning (suppress: 6387)
GetClientRect(gameWnd, &client_rect); // gets a windows coordinates, upper-left corner is (0,0)
w_res.X = client_rect.right;
w_res.Y = client_rect.bottom;
RECT bounding_rect;
#pragma warning (suppress: 6387)
GetWindowRect(gameWnd, &bounding_rect); // gets dimensions of a window
if (!init_ok)
{
if ((w_pos.X != bounding_rect.left) || (w_pos.Y != bounding_rect.top))
{
MoveWindow(hWnd, bounding_rect.left, bounding_rect.top,
client_rect.right, client_rect.bottom, false);
w_pos.X = bounding_rect.left;
w_pos.Y = bounding_rect.top;
}
//SetCursorPos(w_pos.X * 4, w_pos.Y * 4);
//ClipCursor(&gameRect);
}
else
{
if ((bounding_rect.left == 0) && (bounding_rect.top == 0))
{
MoveWindow(hWnd, bounding_rect.left, bounding_rect.top, // changes both the position and dimension of a window
client_rect.right, client_rect.bottom, false);
}
MoveWindow(hWnd, bounding_rect.left, bounding_rect.top, client_rect.right,
client_rect.bottom, false);
}
init_ok = true;
}
}
if (loops % 10 == 0)
{
if (FindWindow(NULL, L"AssaultCube") == NULL)
{
SendMessage(hWnd, WM_CLOSE, NULL, NULL); // calls WindowProc() and sends the message to a window
}
}
loops++;
if (loops > 100) loops = 0;
Render();
}
}
/* This is my WindowProc() function: */
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
}break;
case WM_LBUTTONDOWN:
{
PostMessage(gameWnd, message, wParam, lParam);
return 0;
}
case WM_MOUSEMOVE:
{
SendMessage(gameWnd, message, wParam, lParam);
return 0;
}
}
return DefWindowProc(hWnd, message, wParam, lParam);
}

Answer 1

You didn't post enough code to attempt to solve this problem, we don't see your call to CreateWindowEx().
Here is a working solution for a win32 overlay:
#include <iostream>
#include <windows.h>
using namespace std;
//global forward declerations
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
void cleanUpObjects(HPEN pen);
int CALLBACK WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
RECT overlayWindowRect;
RECT gameWindowRect;
HWND gameWindowHandle;
gameWindowHandle = FindWindowA(0, "AssaultCube");
GetWindowRect(gameWindowHandle, &gameWindowRect);
WNDCLASSEX w;
w.cbSize = sizeof(WNDCLASSEX);
w.style = CS_HREDRAW | CS_VREDRAW;
w.lpfnWndProc = WndProc;
w.cbClsExtra = 0;
w.cbWndExtra = 0;
w.hInstance = hInstance;
w.hIcon = NULL;
w.hCursor = NULL;
w.hbrBackground = (HBRUSH)0;
w.lpszMenuName = NULL;
w.lpszClassName = "ClassName";
w.hIconSm = NULL;
if (!RegisterClassEx(&w))
{
MessageBox(NULL, "Could not Register Class", "Window Title", NULL);
return -1;
}
HWND hWnd = CreateWindowEx(WS_EX_TOPMOST | WS_EX_LAYERED | WS_EX_TRANSPARENT, "ClassName", "Window",
WS_CAPTION,
gameWindowRect.left, //x
gameWindowRect.top, // y
gameWindowRect.right - gameWindowRect.left, // width
gameWindowRect.bottom - gameWindowRect.top, // height
NULL, NULL,
hInstance, NULL);
if (!hWnd)
{
MessageBox(NULL, "Call to create window failed", "Win32 Guided tour", NULL);
return -1;
}
else
{
GetWindowRect(hWnd, &overlayWindowRect);
}
// Remove Borders around window
SetWindowLong(hWnd, GWL_STYLE, GetWindowLong(hWnd, GWL_STYLE) & ~(WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_BORDER));
SetWindowLong(hWnd, GWL_EXSTYLE, GetWindowLong(hWnd, GWL_EXSTYLE) & ~(WS_EX_DLGMODALFRAME | WS_EX_CLIENTEDGE | WS_EX_STATICEDGE));
SetWindowPos(hWnd, NULL, 0, 0, 0, 0, SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_NOOWNERZORDER);
// Make the Background Transparent
SetLayeredWindowAttributes(hWnd, RGB(255, 255, 255), 255, LWA_COLORKEY); // Replaces color white with transparancey
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
HDC myHDC = GetDC(hWnd);
// Drawing Stuff
HPEN myPen = CreatePen(PS_SOLID, 2, RGB(255, 0, 0));
HPEN originalPen;
originalPen = (HPEN)SelectObject(myHDC, myPen);
//main loop waits for messages
MSG msg;
while (true)
{
//peekmessage allows for program to do multiple things at once. faster than getmessage()
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
// if msg is quit, quit
if (msg.message == WM_QUIT)
break;
}
else
{
Rectangle(myHDC, 200, 200, 300, 400);
ZeroMemory(&gameWindowRect, sizeof(gameWindowRect)); //clear out the struct
GetWindowRect(gameWindowHandle, &gameWindowRect); // retrieves the games xy and height width and stores in gamewindowrect
if (gameWindowRect.right != overlayWindowRect.right) // checks if the x coordinates are the same
{
ZeroMemory(&gameWindowRect, sizeof(gameWindowRect)); // clear out struct once again
GetWindowRect(gameWindowHandle, &gameWindowRect); // get the dimensions of the game window again
MoveWindow(hWnd, gameWindowRect.left, gameWindowRect.top, gameWindowRect.right - gameWindowRect.left, gameWindowRect.bottom - gameWindowRect.top, TRUE);
// moves window to specific spot
}
}
Sleep(5);
}
cleanUpObjects(myPen);
cleanUpObjects(originalPen);
return msg.wParam;
}
LRESULT CALLBACK WndProc(
HWND hWnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
)
{
PAINTSTRUCT ps;
HDC hdc;
switch (uMsg)
{
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
DestroyWindow(hWnd);
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, uMsg, wParam, lParam);
break;
}
return 0;
}
//cleans up objects
void cleanUpObjects(HPEN pen)
{
DeleteObject(pen);
}