diff --git a/arkui/window_manager/oh_window.h b/arkui/window_manager/oh_window.h
index 347d1000275db13023663a48045c143e2daa068f..6bd58b82a03a28f31650351cc67d5a2bcb1d63c5 100644
--- a/arkui/window_manager/oh_window.h
+++ b/arkui/window_manager/oh_window.h
@@ -289,6 +289,66 @@ void OH_WindowManager_ReleaseAllWindowLayoutInfoList(WindowManager_Rect* windowL
 int32_t OH_WindowManager_InjectTouchEvent(
     int32_t windowId, Input_TouchEvent* touchEvent, int32_t windowX, int32_t windowY);
 
+/**
+ * @brief Get all main window info on device.
+ *
+ * @permission ohos.permission.CUSTOM_SCREEN_CAPTURE
+ * @param infoList Indicates the pointer to a main window info list.
+ * @param mainWindowInfoSize The size of main window info list.
+ * @return Returns the status code of the execution.
+ *         {@link WS_OK} the function call is successful.
+ *         {@link WINDOW_MANAGER_ERRORCODE_NO_PERMISSION} permission verification failed.
+ *         {@link WINDOW_MANAGER_ERRORCODE_DEVICE_NOT_SUPPORTED} capability not supported.
+ *         {@link WINDOW_MANAGER_ERRORCODE_SYSTEM_ABNORMAL} the window manager service works abnormally.
+ * @since 21
+ */
+int32_t OH_WindowManager_GetAllMainWindowInfo(
+    WindowManager_MainWindowInfo** infoList, size_t* mainWindowInfoSize);
+
+/**
+ * @brief Release all main window info list.
+ *
+ * @param infoList Pointer to the main window info list.
+ * @since 21
+ */
+void OH_WindowManager_ReleaseAllMainWindowInfo(WindowManager_MainWindowInfo* infoList);
+
+/**
+ * @brief Callback interface for getting main windows' snapshot.
+ *
+ * @param snapshotPixelMapList List of windows' snapshot
+ * @param snapshotListSize Size of snapshotPixelMapList
+ * @since 21
+ */
+typedef void (*OH_WindowManager_WindowSnapshotCallback)(const OH_PixelmapNative* snapshotPixelMapList,
+    size_t snapshotListSize);
+
+/**
+ * @brief Get snapshot of  the specified windows.
+ *
+ * @permission @code ohos.permission.CUSTOM_SCREEN_CAPTURE
+ * @param windowIdList Main window id list for getting snapshot.
+ * @param windowIdListSize Size of main window id list.
+ * @param config Configuration for getting snapshot.
+ * @param callback Snapshot callback object.
+ * @return Returns the status code of the execution.
+ *         {@link WS_OK} the function call is successful.
+ *         {@link WINDOW_MANAGER_ERRORCODE_NO_PERMISSION} permission verification failed.
+ *         {@link WINDOW_MANAGER_ERRORCODE_DEVICE_NOT_SUPPORTED} capability not supported.
+ *         {@link WINDOW_MANAGER_ERRORCODE_SYSTEM_ABNORMAL} the window manager service works abnormally.
+ * @since 21
+ */
+int32_t OH_WindowManager_GetMainWindowSnapshot(int32_t* windowIdList, size_t windowIdListSize,
+    WindowManager_WindowSnapshotConfig config, OH_WindowManager_WindowSnapshotCallback callback);
+
+/**
+ * @brief Release main window snapshot list.
+ *
+ * @param snapshotPixelMapList Indicates the pointer of a windows' snapshot list.
+ * @since 21
+ */
+void OH_WindowManager_ReleaseMainWindowSnapshot(const OH_PixelmapNative* snapshotPixelMapList);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/arkui/window_manager/oh_window_comm.h b/arkui/window_manager/oh_window_comm.h
index 152c9a318270f77fde5a60ae796c8a5b502f744d..46be3abab20125d71d62f14121deae29ccb74ec5 100644
--- a/arkui/window_manager/oh_window_comm.h
+++ b/arkui/window_manager/oh_window_comm.h
@@ -229,6 +229,32 @@ typedef struct {
     WindowManager_Rect bottomRect;
 } WindowManager_AvoidArea;
 
+/**
+ * @brief Main window info
+ *
+ * @since 21
+ */
+typedef struct {
+    /** Display id of the window. */
+    uint64_t displayId;
+    /** Window id. */
+    int32_t windowId;;
+    /** Showing state of the window. */
+    bool showing;
+    /** Label of the window. */
+    const char* label;
+} WindowManager_MainWindowInfo;
+
+/**
+ * @brief Window snapshot config info
+ *
+ * @since 21
+ */
+typedef struct {
+    /** Use cached windows' snapshot. */
+    bool useCache;
+} WindowManager_WindowSnapshotConfig;
+
 #ifdef __cplusplus
 }
 #endif