Dear ImGui 1.88 WIP (18713)
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sizeof(size_t): 8, sizeof(ImDrawIdx): 2, sizeof(ImDrawVert): 20
define: __cplusplus=199711
define: _WIN32
define: _WIN64
define: _MSC_VER=1930
define: _MSVC_LANG=201402
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io.BackendPlatformName: imgui_impl_win32
io.BackendRendererName: imgui_impl_dx11
io.ConfigFlags: 0x00000001
 NavEnableKeyboard
io.ConfigInputTextCursorBlink
io.ConfigWindowsResizeFromEdges
io.ConfigMemoryCompactTimer = 60.0
io.BackendFlags: 0x0000000E
 HasMouseCursors
 HasSetMousePos
 RendererHasVtxOffset
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io.Fonts: 1 fonts, Flags: 0x00000000, TexSize: 512,64
io.DisplaySize: 1264.00,761.00
io.DisplayFramebufferScale: 1.00,1.00
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style.WindowPadding: 8.00,8.00
style.WindowBorderSize: 1.00
style.FramePadding: 4.00,3.00
style.FrameRounding: 0.00
style.FrameBorderSize: 0.00
style.ItemSpacing: 8.00,4.00
style.ItemInnerSpacing: 4.00,4.00

#include <string>

io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;

{
    static int selected = 0;
    ImGui::Begin("Scroll and Selectable", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
    if (ImGui::BeginTable("Items", 2, ImGuiTableFlags_ScrollY, ImVec2(300, 300)))
    {
        ImGui::TableSetupScrollFreeze(0, 1);
        ImGui::TableSetupColumn("#");
        ImGui::TableSetupColumn("Text");
        ImGui::TableHeadersRow();

        for (int i = 0; i < 100; ++i)
        {
            ImGui::TableNextRow();
            ImGui::TableNextColumn();

            bool is_selected = i == selected;
            if (ImGui::Selectable(std::to_string(i).c_str(), &is_selected, ImGuiSelectableFlags_SpanAllColumns))
            {
                selected = i;
            }
            ImGui::TableNextColumn();
            ImGui::Text("Example text");
        }

        ImGui::EndTable();
    }
    ImGui::End();
}