# lv_windows_context.h (/api/private/drivers/windows/lv_windows_context_h)



<ApiSummary functions="2" structs="6" typedefs="6" macros="2" />

Functions [#functions]

<ApiTabs items="[&#x22;Getters (1)&#x22;,&#x22;Other (1)&#x22;]">
  <ApiTab value="Getters (1)">
    <ApiMember kind="function" name="lv_windows_get_window_context" file="private/drivers/windows/lv_windows_context.h" line="120" url="https://github.com/lvgl/lvgl/tree/e1a0ad863f29742359bc680d6a7d973448ec2285/src/drivers/windows/lv_windows_context.h#L120">
      lv_windows_get_window_context [#lv_windows_get_window_context]

      Get the window context from specific LVGL display window.

      ```c title=" " lineNumbers=1
      lv_windows_window_context_t * lv_windows_get_window_context(HWND window_handle)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name            | Type                    | Description                                        |
      | --------------- | ----------------------- | -------------------------------------------------- |
      | `window_handle` | <ApiLink name="HWND" /> | The window handle of specific LVGL display window. |

      **Returns:** <ApiLink name="lv_windows_window_context_t" display="lv_windows_window_context_t *" /> — The window context from specific LVGL display window.

      <Callout type="info">
        **Remark:** This is a private API which is used for LVGL Windows backend implementation. LVGL users shouldn't use that because the maintainer doesn't promise the application binary interface compatibility for this API.
      </Callout>
    </ApiMember>
  </ApiTab>

  <ApiTab value="Other (1)">
    <ApiMember kind="function" name="lv_windows_platform_init" file="private/drivers/windows/lv_windows_context.h" line="109" url="https://github.com/lvgl/lvgl/tree/e1a0ad863f29742359bc680d6a7d973448ec2285/src/drivers/windows/lv_windows_context.h#L109">
      lv_windows_platform_init [#lv_windows_platform_init]

      Initialize the LVGL Windows backend.

      ```c title=" " lineNumbers=1
      void lv_windows_platform_init(void)
      ```

      <Callout type="info">
        **Remark:** This is a private API which is used for LVGL Windows backend implementation. LVGL users shouldn't use that because the LVGL has already used it in lv\_init.
      </Callout>
    </ApiMember>
  </ApiTab>
</ApiTabs>

Structs [#structs]

<ApiMember kind="struct" name="_lv_windows_pointer_context_t">
  \_lv_windows_pointer_context_t [#_lv_windows_pointer_context_t]

  | Member  | Type                                                 | Description |
  | ------- | ---------------------------------------------------- | ----------- |
  | `state` | <ApiLink name="lv_indev_state_t" />                  |             |
  | `point` | <ApiLink name="lv_point_t" />                        |             |
  | `indev` | <ApiLink name="lv_indev_t" display="lv_indev_t *" /> |             |
</ApiMember>

<ApiMember kind="struct" name="_lv_windows_keypad_queue_item_t">
  \_lv_windows_keypad_queue_item_t [#_lv_windows_keypad_queue_item_t]

  | Member  | Type                                | Description |
  | ------- | ----------------------------------- | ----------- |
  | `key`   | `uint32_t`                          |             |
  | `state` | <ApiLink name="lv_indev_state_t" /> |             |
</ApiMember>

<ApiMember kind="struct" name="_lv_windows_keypad_context_t">
  \_lv_windows_keypad_context_t [#_lv_windows_keypad_context_t]

  | Member                 | Type                                                 | Description |
  | ---------------------- | ---------------------------------------------------- | ----------- |
  | `queue`                | <ApiLink name="lv_ll_t" />                           |             |
  | `utf16_high_surrogate` | `uint16_t`                                           |             |
  | `utf16_low_surrogate`  | `uint16_t`                                           |             |
  | `indev`                | <ApiLink name="lv_indev_t" display="lv_indev_t *" /> |             |
</ApiMember>

<ApiMember kind="struct" name="_lv_windows_encoder_context_t">
  \_lv_windows_encoder_context_t [#_lv_windows_encoder_context_t]

  | Member     | Type                                                 | Description |
  | ---------- | ---------------------------------------------------- | ----------- |
  | `state`    | <ApiLink name="lv_indev_state_t" />                  |             |
  | `enc_diff` | `int16_t`                                            |             |
  | `indev`    | <ApiLink name="lv_indev_t" display="lv_indev_t *" /> |             |
</ApiMember>

<ApiMember kind="struct" name="_lv_windows_window_context_t">
  \_lv_windows_window_context_t [#_lv_windows_window_context_t]

  | Member                               | Type                                                     | Description |
  | ------------------------------------ | -------------------------------------------------------- | ----------- |
  | `display_device_object`              | <ApiLink name="lv_display_t" display="lv_display_t *" /> |             |
  | `display_timer_object`               | <ApiLink name="lv_timer_t" display="lv_timer_t *" />     |             |
  | `window_dpi`                         | `int32_t`                                                |             |
  | `zoom_level`                         | `int32_t`                                                |             |
  | `allow_dpi_override`                 | `bool`                                                   |             |
  | `simulator_mode`                     | `bool`                                                   |             |
  | `display_resolution_changed`         | `bool`                                                   |             |
  | `requested_display_resolution`       | <ApiLink name="lv_point_t" />                            |             |
  | `display_framebuffer_context_handle` | `HDC`                                                    |             |
  | `display_framebuffer_base`           | `uint32_t *`                                             |             |
  | `display_framebuffer_size`           | `size_t`                                                 |             |
  | `pointer`                            | <ApiLink name="lv_windows_pointer_context_t" />          |             |
  | `keypad`                             | <ApiLink name="lv_windows_keypad_context_t" />           |             |
  | `encoder`                            | <ApiLink name="lv_windows_encoder_context_t" />          |             |
</ApiMember>

<ApiMember kind="struct" name="_lv_windows_create_display_data_t">
  \_lv_windows_create_display_data_t [#_lv_windows_create_display_data_t]

  | Member               | Type                                                     | Description |
  | -------------------- | -------------------------------------------------------- | ----------- |
  | `title`              | `const wchar_t *`                                        |             |
  | `hor_res`            | `int32_t`                                                |             |
  | `ver_res`            | `int32_t`                                                |             |
  | `zoom_level`         | `int32_t`                                                |             |
  | `allow_dpi_override` | `bool`                                                   |             |
  | `simulator_mode`     | `bool`                                                   |             |
  | `mutex`              | `HANDLE`                                                 |             |
  | `display`            | <ApiLink name="lv_display_t" display="lv_display_t *" /> |             |
</ApiMember>

Typedefs [#typedefs]

<ApiMember kind="typedef" name="lv_windows_pointer_context_t" file="private/drivers/windows/lv_windows_context.h" line="47" url="https://github.com/lvgl/lvgl/tree/e1a0ad863f29742359bc680d6a7d973448ec2285/src/drivers/windows/lv_windows_context.h#L47">
  lv_windows_pointer_context_t [#lv_windows_pointer_context_t]

  ```c title=" " lineNumbers=1
  typedef struct _lv_windows_pointer_context_t lv_windows_pointer_context_t
  ```
</ApiMember>

<ApiMember kind="typedef" name="lv_windows_keypad_queue_item_t" file="private/drivers/windows/lv_windows_context.h" line="52" url="https://github.com/lvgl/lvgl/tree/e1a0ad863f29742359bc680d6a7d973448ec2285/src/drivers/windows/lv_windows_context.h#L52">
  lv_windows_keypad_queue_item_t [#lv_windows_keypad_queue_item_t]

  ```c title=" " lineNumbers=1
  typedef struct _lv_windows_keypad_queue_item_t lv_windows_keypad_queue_item_t
  ```
</ApiMember>

<ApiMember kind="typedef" name="lv_windows_keypad_context_t" file="private/drivers/windows/lv_windows_context.h" line="59" url="https://github.com/lvgl/lvgl/tree/e1a0ad863f29742359bc680d6a7d973448ec2285/src/drivers/windows/lv_windows_context.h#L59">
  lv_windows_keypad_context_t [#lv_windows_keypad_context_t]

  ```c title=" " lineNumbers=1
  typedef struct _lv_windows_keypad_context_t lv_windows_keypad_context_t
  ```
</ApiMember>

<ApiMember kind="typedef" name="lv_windows_encoder_context_t" file="private/drivers/windows/lv_windows_context.h" line="65" url="https://github.com/lvgl/lvgl/tree/e1a0ad863f29742359bc680d6a7d973448ec2285/src/drivers/windows/lv_windows_context.h#L65">
  lv_windows_encoder_context_t [#lv_windows_encoder_context_t]

  ```c title=" " lineNumbers=1
  typedef struct _lv_windows_encoder_context_t lv_windows_encoder_context_t
  ```
</ApiMember>

<ApiMember kind="typedef" name="lv_windows_window_context_t" file="private/drivers/windows/lv_windows_context.h" line="86" url="https://github.com/lvgl/lvgl/tree/e1a0ad863f29742359bc680d6a7d973448ec2285/src/drivers/windows/lv_windows_context.h#L86">
  lv_windows_window_context_t [#lv_windows_window_context_t]

  ```c title=" " lineNumbers=1
  typedef struct _lv_windows_window_context_t lv_windows_window_context_t
  ```
</ApiMember>

<ApiMember kind="typedef" name="lv_windows_create_display_data_t" file="private/drivers/windows/lv_windows_context.h" line="97" url="https://github.com/lvgl/lvgl/tree/e1a0ad863f29742359bc680d6a7d973448ec2285/src/drivers/windows/lv_windows_context.h#L97">
  lv_windows_create_display_data_t [#lv_windows_create_display_data_t]

  ```c title=" " lineNumbers=1
  typedef struct _lv_windows_create_display_data_t lv_windows_create_display_data_t
  ```
</ApiMember>

Macros [#macros]

<ApiMember kind="macro" name="CREATE_WAITABLE_TIMER_MANUAL_RESET" file="private/drivers/windows/lv_windows_context.h" line="28" url="https://github.com/lvgl/lvgl/tree/e1a0ad863f29742359bc680d6a7d973448ec2285/src/drivers/windows/lv_windows_context.h#L28">
  CREATE_WAITABLE_TIMER_MANUAL_RESET [#create_waitable_timer_manual_reset]

  ```c title=" " lineNumbers=1
  #define CREATE_WAITABLE_TIMER_MANUAL_RESET 0x00000001
  ```
</ApiMember>

<ApiMember kind="macro" name="CREATE_WAITABLE_TIMER_HIGH_RESOLUTION" file="private/drivers/windows/lv_windows_context.h" line="32" url="https://github.com/lvgl/lvgl/tree/e1a0ad863f29742359bc680d6a7d973448ec2285/src/drivers/windows/lv_windows_context.h#L32">
  CREATE_WAITABLE_TIMER_HIGH_RESOLUTION [#create_waitable_timer_high_resolution]

  ```c title=" " lineNumbers=1
  #define CREATE_WAITABLE_TIMER_HIGH_RESOLUTION 0x00000002
  ```
</ApiMember>

Dependencies [#dependencies]

<FileIncludes includes="[&#x22;lvgl_public.h&#x22;, &#x22;windows.h&#x22;]" includedBy="[&#x22;lvgl_private.h&#x22;]" />