click_toolbar_button.cpp

#include <windows.h>
#include <Commctrl.h>

int main(int argc, char* argv[])
{
    DWORD dwProcessID;
    SIZE_T nNumberOfBytesRead;
    HWND window = (HWND)0x4b0cb6;

    GetWindowThreadProcessId((HWND)window, &dwProcessID);
    HANDLE hProcess = OpenProcess(PROCESS_VM_OPERATION | PROCESS_VM_READ | PROCESS_VM_WRITE, false, dwProcessID);
    void* Pointer = VirtualAllocEx(hProcess, NULL, 4096, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);

    RECT bi;
    SendMessage((HWND)window, TB_GETITEMRECT, 1 /* индекс кнопки*/, (LPARAM)Pointer);

    ReadProcessMemory(hProcess, (Pointer), &bi, sizeof(bi), &nNumberOfBytesRead);

    PostMessage((HWND)window, WM_LBUTTONDOWN, NULL, MAKELPARAM(bi.left, bi.top));
    PostMessage((HWND)window, WM_LBUTTONUP, NULL, MAKELPARAM(bi.left, bi.top));
    return 0;
}